Preheat oven to 400 degrees. Line baking tray with parchment paper.
Place frozen breaded chicken breasts on prepared pan. Bake for 25 minutes in preheated oven.
Put cheese on sandwiches and bake 3-4 more minutes, or until cheese is melted as desired.
Optional: while cheese melts, butter the inside of the hamburger buns and toast in a nonstick pan on medium heat for a couple minutes or until desired brownness.
Remove chicken from oven. Place on hamburger buns, top with pickles and/or desired sauce. Enjoy!
Notes
If you do not have a Costco membership, you could probably substitute Just Bare Lightly Breaded Chicken Breasts. I can't guarantee the taste though.