Preheat oven to 350. Cut excess fat off chicken breasts. Beat egg with a tablespoon of water for an egg wash. Dip the breasts in egg wash and roll in bread crumbs to coat. In a skillet over medium heat pan-fry the chicken breasts until golden brown on both sides. (The chicken will finish cooking in the oven.)
In the bottom of a shallow baking dish place enough marinara sauce to cover the dish. Place chicken breasts on the sauce and cover with remaining pasta sauce. (Enough to cover chicken.)
Bake covered for 20-25 minutes; uncover and add the cheese and continue baking for another 10 minutes uncovered until cheese is browned. Serve with pasta if desired.