Step 1: Prepare the Filling

1. Heat olive oil in a skillet over medium heat. Add the minced garlic and sauté for 30 seconds until fragrant.
2. Stir in the chopped spinach and cook until wilted, about 2-3 minutes. Remove from heat and let cool slightly.
3. In a mixing bowl, combine the cooked spinach, feta cheese, cream cheese, Parmesan cheese, lemon zest, salt, and pepper. Mix until smooth and evenly combined. Set aside.

Step 2: Prepare the Salmon

1. Lay the salmon fillet flat on a cutting board. Use a sharp knife to carefully butterfly the fillet, cutting horizontally to open it like a book. Do not cut all the way through.
2. Once butterflied, place plastic wrap over the salmon and use a meat mallet or rolling pin to gently pound it into an even thickness, about ½ inch. This ensures the salmon will cook evenly and roll easily.

Step 3: Assemble the Pinwheels

1. Remove the plastic wrap and spread the spinach and feta filling evenly over the salmon, leaving a ½-inch border around the edges.
2. Starting at one end, carefully roll the salmon into a tight log, similar to rolling sushi. Use your fingers to keep the filling in place as you roll.
3. Once rolled, use kitchen twine to tie the salmon log at 1- to 2-inch intervals, ensuring the roll stays intact during cooking.

Step 4: Season the Outside

1. Brush the outside of the salmon log with olive oil and season with smoked paprika, salt, and pepper for added flavor and a beautiful golden crust.

Step 5: Slice and Bake

1. Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
2. Use a sharp knife to slice the salmon log into 1 ½-inch-thick pinwheels. Place the pinwheels cut-side up on the prepared baking sheet.
3. Bake for 20-25 minutes, or until the salmon is cooked through and reaches an internal temperature of 145°F (63°C).

Step 6: Garnish and Serve

1. Remove the pinwheels from the oven and let them rest for 5 minutes.
2. Garnish with fresh dill or parsley and serve with lemon wedges. Pair with your favorite side dishes for a complete meal.