Preheat oven to 400 F.
In a bowl, combine ricotta (1 cup), parmesan (1/2 cup), egg (1), Italian seasoning (1 tablespoon), salt (1/2 teaspoon) and pepper (1/4 teaspoon). Set aside, this is your “lasagna stuffing”.
Generously salt and pepper each side of the chicken breast and gently pat to adhere.
Slice chicken breast in half to form a “pocket”.
Place a spoonful of marinara in each chicken breast. Use the back of the spoon to spread and even out this layer.
Spoon an even amount of lasagna stuffing in each of the chicken breasts.
Cover with the remaining marinara.
Sprinkle mozzarella on top.
Bake in the oven for 35 minutes. Ensure the chicken is cooked through and no longer pink** — if using a meat thermometer, the chicken should be at least 165 F in the thickest part.
Serve with fresh basil and enjoy!