Step 1

In a medium skillet over medium-high heat, caramelize sliced onions in 1 tablespoon butter until a deep golden brown, stirring occasionally (about 10 minutes) Stir in mushrooms, garlic, and salt and pepper to taste, cooking an additional 5-8 minutes until mushrooms are softened. Set aside

Step 2

Cut a slit in each chicken breast about 2/3 through. In a small bowl, combine paprika, salt, Italian seasoning, and pepper. Rub spice mixture on both sides of each breast. Fill each breast pocket with onion/mushroom mixture and top with a slice of Swiss cheese. Seal chicken breasts closed and secure with toothpicks.

Step 3

In a medium skillet over medium-high heat, melt remaining tablespoon butter with oil. Sear chicken 2-3 minutes on both sides until chicken is a deep golden-brown. Place skillet in 375F oven and bake an additional 15-20 minutes or until chicken registers 165F. Remove toothpicks from chicken breasts and serve hot. Enjoy!