This one is simple: Heat oven to 375 degrees
Create a pocket in the side of each chicken breast
Mix together a handful each of chopped onions and mushrooms, and handful of shredded cheese
Stuff each breast with the mixture and close with a toothpick, season both with salt and pepper
Heat a tablespoon of olive oil over medium heat in an oven-proof saute pan large enough for both breasts
Sear both breasts on each side until brown
Sprinkle whatever remaining mushroom mixture on top and place saute pan with chicken in the oven and bake for 15 min.
That’s it! Don’t forget to let the chicken rest on a cutting board once finished for 5 minutes or so.