There are two things I almost always have in my fridge - salsa and cheese. I'm not sure why - well, actually, I guess I do know why - because salsa and cheese are awesome. Especially cheese.
2 chicken breasts
1/4 cup salsa
1/4 cup shredded cheese
Cut fat off of the chicken. Combine chicken with salsa in a large zip locking bag. Shake until chicken is completely covered.
Let sit in fridge for 30-45 minutes (or longer).
Preheat oven to 350. Place chicken in a glass dish and sprinkle cheese on top. Bake for 20-40 minutes, depending on size of chicken.