Tennessee Onions

Tennessee Onions are a Southern comfort food classic that takes the humble onion to gourmet levels. Baked to perfection with a medley of rich cheeses, creamy sauce, and a hint of savory herbs, this dish is a versatile and indulgent alternative to traditional onion rings. Perfect as a side dish, appetizer, or even a topping for burgers and steaks, Tennessee Onions deliver all the flavor of onion rings with less mess and a more sophisticated presentation. Whether you’re hosting a family dinner or a game-day gathering, this recipe is guaranteed to be a hit.

Why You’ll Love This Recipe

• Easy to Make: No deep-frying or breading involved, making it a simpler option than traditional onion rings.
• Rich and Flavorful: The combination of baked onions, melty cheese, and creamy sauce creates an irresistible dish.
• Crowd-Pleaser: Whether served as a side or appetizer, Tennessee Onions always disappear quickly.
• Customizable: Adapt the cheeses, herbs, or seasonings to match your taste preferences.
• Make-Ahead Friendly: This dish can be prepped in advance, making it perfect for busy days or entertaining.

Preparation Time and Servings

• Prep Time: 10 minutes
• Cook Time: 35 minutes
• Total Time: 45 minutes
• Yield: 6 servings
• Serving Size: 1/6 of the dish

Nutritional Information (per serving)

• Calories: 280
• Carbohydrates: 12g
• Protein: 9g
• Fat: 22g
• Fiber: 2g
• Sugar: 5g

Ingredients

For the Onions

• 2-3 large sweet onions (e.g., Vidalia or Walla Walla), peeled and sliced into 1/2-inch rings
• 2 tbsp unsalted butter, melted
• 1 tbsp olive oil
• 1/2 tsp salt
• 1/4 tsp black pepper

For the Cheese Topping

• 1 cup shredded mozzarella cheese
• 1/2 cup shredded Parmesan cheese
• 1/2 cup shredded cheddar cheese
• 1/2 cup mayonnaise
• 1/4 cup sour cream
• 1 tsp garlic powder
• 1/2 tsp smoked paprika
• 1/2 tsp dried thyme (or fresh thyme leaves for garnish)

For Garnish (Optional)

• 2 tbsp chopped fresh parsley
• 1/4 cup crispy fried onions or breadcrumbs for crunch

Step-by-Step Instructions

Step 1: Prepare the Onions

1. Preheat your oven to 375°F (190°C). Grease a 9×13-inch baking dish with butter or non-stick spray.
2. Peel the onions and slice them into 1/2-inch-thick rings. Separate the rings and arrange them in a single layer in the prepared baking dish.
3. Drizzle the melted butter and olive oil over the onions. Sprinkle with salt and black pepper, tossing gently to coat evenly.

Step 2: Make the Cheese Topping

1. In a mixing bowl, combine the shredded mozzarella, Parmesan, and cheddar cheeses.
2. Add the mayonnaise, sour cream, garlic powder, smoked paprika, and dried thyme. Stir until well combined.

Step 3: Assemble the Dish

1. Spoon the cheese mixture evenly over the onion rings, making sure each ring is generously coated.
2. Sprinkle additional cheese or breadcrumbs on top for extra texture, if desired.

Step 4: Bake

1. Cover the baking dish with aluminum foil and bake for 25 minutes.
2. Remove the foil and bake uncovered for an additional 10 minutes, or until the cheese is golden and bubbly.

Step 5: Garnish and Serve

1. Remove the dish from the oven and let it cool slightly. Sprinkle with fresh parsley and crispy fried onions, if using, before serving.
2. Serve warm as a side dish, appetizer, or topping.

Ingredient Background

• Sweet Onions: Vidalia or Walla Walla onions are ideal for this recipe due to their natural sweetness, which intensifies when baked.
• Cheese Blend: The combination of mozzarella, Parmesan, and cheddar ensures a balance of creaminess, saltiness, and a rich, melty texture.
• Mayonnaise and Sour Cream: These ingredients create the creamy base that melds with the cheese for a luscious topping.
• Smoked Paprika: Adds a subtle smokiness that enhances the onions’ natural flavor.

Technique Tips

• Even Onion Slices: For uniform cooking, use a sharp knife or mandoline slicer to cut the onions into evenly thick slices, approximately 1/2 inch. If the slices are uneven, thinner rings may overcook while thicker ones remain undercooked. Uniform slicing ensures that all the onions bake to the same tender texture.
• Layering: Slightly overlapping the onion rings in the baking dish creates a cohesive, casserole-like consistency, which helps the cheese topping melt evenly into the onions. If you prefer a lighter texture, arrange the rings in a single layer with a little space between them for better browning.
• Cheese Browning: To achieve that irresistible golden-brown finish, switch the oven to broil mode for the last 2-3 minutes of baking. Watch closely to prevent burning. If you like a bit of extra crunch, sprinkle breadcrumbs on top before broiling for a dual-layer texture.
• Control Moisture: Pat the onion rings dry with a paper towel before layering them in the dish. Removing excess moisture ensures that the onions bake rather than steam, resulting in a better texture and flavor.

Alternative Presentation Ideas

• Individual Servings: Divide the onion rings and cheese topping into ramekins, mini cast-iron skillets, or oven-safe bowls to create personalized portions. This not only elevates the presentation but also allows guests to enjoy a hot, freshly baked serving. Top with a sprig of fresh thyme or parsley for an added touch of elegance.
• Layered Casserole: For a lasagna-like approach, alternate layers of onion rings and cheese topping in a deep baking dish. Begin with a thin layer of cheese mixture at the bottom, followed by a layer of onion rings, and repeat until the dish is filled. Finish with a thick layer of cheese on top to seal in the moisture and flavor.
• Party Appetizer: Transform Tennessee Onions into bite-sized finger food by placing smaller portions on toasted crostini or crackers. Spoon a bit of the cheesy mixture onto each crostini, then top with a small onion ring and broil briefly for a warm, crispy, and crowd-pleasing appetizer.
• Stuffed Potatoes: Hollow out baked potato halves and fill them with a mixture of cooked onion rings and cheese topping. Return them to the oven to bake until golden and bubbly for a creative twist on twice-baked potatoes.
• Bread Bowl: Serve the cheesy baked onions inside a hollowed-out bread bowl for a rustic, shareable dish. The bread can soak up the cheesy goodness, making it a perfect pairing for soups or stews.

Additional Tips for Success

• Mandoline Slicer: Use a mandoline slicer for perfectly uniform onion slices, ensuring that they cook evenly. Always use the hand guard provided with the slicer to protect your fingers, especially when slicing smaller onion pieces. If you don’t have a mandoline, a sharp knife will work with careful attention to consistency.
• Crispy Topping: For a more decadent, crispy topping, mix panko breadcrumbs or crushed crackers with melted butter and sprinkle over the cheese topping before baking. Adding a sprinkle of grated Parmesan to the breadcrumb mixture enhances both flavor and texture.
• Cooling Time: Let the dish rest for about 5 minutes after baking. This allows the cheese to set slightly, making it easier to serve and ensuring that each portion stays intact. A brief cooling period also enhances the overall flavor, as the dish has a chance to settle.
• Use Fresh Cheese: Grate cheese fresh from the block rather than using pre-shredded cheese, which often contains anti-caking agents that can affect melting. Freshly grated cheese ensures a smoother, creamier topping.
• Boost Flavor with Broth: For added depth of flavor, drizzle a small amount of vegetable or chicken broth over the onion rings before adding the cheese topping. This can infuse the dish with subtle, savory undertones.
• Add Fresh Herbs: Sprinkle fresh thyme, rosemary, or parsley over the baked onions right before serving for a burst of color and aroma. The herbs not only enhance the flavor but also give the dish a vibrant, inviting presentation.

Recipe Variations

• Spicy Tennessee Onions: Add crushed red pepper flakes or a dash of hot sauce to the cheese mixture for a spicy kick.
• Bacon-Topped Onions: Sprinkle cooked, crumbled bacon over the cheese topping for a smoky, meaty flavor.
• Low-Carb Option: Skip the breadcrumbs and use full-fat sour cream and mayonnaise for a keto-friendly version.
• Vegan Option: Substitute dairy-free cheese, vegan mayo, and coconut cream for the cheese topping to make this dish plant-based.
• Herb Lovers: Incorporate fresh rosemary, oregano, or basil into the cheese mixture for an herbaceous twist.

Freezing and Storage

• Refrigeration: Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven at 350°F until warmed through.
• Freezing: Assemble the dish but don’t bake it. Wrap tightly with plastic wrap and aluminum foil and freeze for up to 2 months. Thaw overnight in the refrigerator before baking as directed.

Healthier Twist Ideas

• Greek Yogurt Swap: Replace sour cream with plain Greek yogurt for added protein and reduced fat.
• Light Cheese: Use reduced-fat mozzarella and cheddar to cut calories while keeping the dish cheesy.
• Less Butter: Drizzle onions with vegetable broth instead of butter for a lighter alternative.
• Extra Veggies: Add layers of sliced zucchini, mushrooms, or bell peppers for more nutrients and color.

Serving Suggestions for Events

• Game Day Spread: Serve Tennessee Onions alongside sliders, wings, and a veggie platter for a crowd-pleasing spread.
• Holiday Side Dish: Add this dish to your Thanksgiving or Christmas table as a unique alternative to traditional casseroles.
• Potluck Favorite: Bring Tennessee Onions to your next potluck; they’re easy to transport and reheat beautifully.
• Burger Topping: Use these cheesy onions as a decadent topping for burgers, hot dogs, or grilled chicken sandwiches.

Special Equipment

• 9×13-inch baking dish
• Mandoline slicer or sharp knife
• Mixing bowl for cheese topping
• Aluminum foil

Frequently Asked Questions

1. Can I use regular onions instead of sweet onions?
Yes, but sweet onions provide a milder and sweeter flavor that works best in this dish. If using regular onions, consider soaking them in water for 10 minutes to reduce sharpness.

2. What can I use instead of mayonnaise?
You can substitute mayonnaise with cream cheese or plain Greek yogurt for a slightly tangier flavor.

3. How do I make the dish gluten-free?
Ensure the breadcrumbs (if using) are gluten-free, or omit them entirely. All other ingredients are naturally gluten-free.

4. Can I make this dish ahead of time?
Yes! Assemble the dish up to 24 hours in advance and store it in the refrigerator. Bake just before serving.

5. How do I prevent the onions from becoming mushy?
Avoid overbaking and ensure the onion slices are cut thick enough (about 1/2 inch).

6. Can I add meat to this recipe?
Absolutely! Crumbled sausage or diced ham can be layered with the onions for a heartier dish.

7. How do I make it extra crispy?
Mix breadcrumbs or crushed crackers with melted butter and sprinkle over the cheese topping before baking.

8. Can I use pre-shredded cheese?
While convenient, pre-shredded cheese often contains anti-caking agents that can affect melting. Freshly shredded cheese is best for this recipe.

Conclusion

Tennessee Onions are a game-changing dish that offers all the flavor of onion rings with none of the hassle. Whether served as a savory side dish, a comforting casserole, or a unique topping, these cheesy baked onions are sure to become a family favorite. With endless customization options and simple preparation, they’re a must-try recipe for any occasion. Bake up a dish of Tennessee Onions today and enjoy the perfect balance of indulgence and Southern charm!

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