1. Prepare the Chicken

1. Flatten the Chicken: Place each chicken breast between two sheets of plastic wrap or parchment paper. Use a meat mallet or rolling pin to pound the chicken to an even thickness (about ½ inch).
2. Set Up a Breading Station: Prepare three shallow bowls:
   • Bowl 1: Flour.
   • Bowl 2: Eggs beaten with Dijon mustard (if using).
   • Bowl 3: Crushed pretzels mixed with garlic powder, smoked paprika, and black pepper.

2. Bread the Chicken

1. Coat in Flour: Dredge each chicken breast in the flour, shaking off any excess.
2. Dip in Egg Wash: Dip the floured chicken into the beaten eggs, ensuring it’s fully coated.
3. Coat with Pretzels: Press the chicken into the crushed pretzels, ensuring an even coating on both sides.

3. Cook the Chicken

1. Heat the Oil: In a large skillet, heat the vegetable oil over medium heat.
2. Cook the Chicken: Add the breaded chicken breasts to the skillet and cook for 4-5 minutes per side, or until golden brown and the internal temperature reaches 165°F (74°C). Cook in batches if necessary to avoid overcrowding the pan.
3. Keep Warm: Transfer the cooked chicken to a plate and cover loosely with foil to keep warm while you prepare the sauce.

4. Make the Mustard-Cheddar Sauce

1. Make a Roux: In a small saucepan, melt the butter over medium heat. Stir in the flour and cook for 1-2 minutes, whisking constantly, until the mixture is smooth and bubbly.
2. Add the Milk: Gradually whisk in the milk, continuing to stir to prevent lumps. Cook for 3-4 minutes, or until the sauce begins to thicken.
3. Add Mustard and Cheese: Stir in the Dijon mustard, yellow mustard, and shredded cheddar cheese. Cook for 1-2 minutes, or until the cheese is fully melted and the sauce is smooth. Season with salt and pepper to taste.

5. Assemble and Serve

1. Plate the Chicken: Place a chicken breast on each plate.
2. Top with Sauce: Spoon the mustard-cheddar sauce generously over the chicken.
3. Garnish and Serve: Garnish with chopped parsley and extra crushed pretzels if desired. Serve with your favorite sides and enjoy!