Preheat and prepare: Preheat oven to 375° F. Coat a 9x13 casserole dish with nonstick cooking spray.
Make sauce: In a shallow bowl or pie pan, mix together 1/2 cup mayonnaise, 1/4 cup of the parmesan cheese, 1 teaspoon garlic powder, 1 teaspoon Italian seasoning, 1/2 teaspoon salt, and 1/2 teaspoon pepper.
Dip chicken: Coat the chicken with the sauce and place in the prepared casserole dish. Top with slices of swiss cheese and sprinkle remaining 1/4 cup parmesan cheese on top. Add more if desired.
Bake: Bake for 45 minutes, or until chicken reaches 165°F. Serve warm with rice.
Notes
Pan size: You may use a 8x8 baking dish if your chicken breasts are smaller.Storage: Store leftovers in an airtight container in the fridge for up to 3-4 days.To Freeze: Let the chicken cool completely, then wrap each piece in plastic wrap or place in a freezer-safe container for up to 2 months. Thaw and reheat.Make Ahead: Assemble the dish up to a day in advance and refrigerate covered until ready to bake.