Slice your peppers in half and place in a casserole dish.
Put a large spoon (about 1/2 cup) of meat sauce in each pepper half.
Put a large dollop (about 1/4 cup) of ricotta cheese on top of the meat sauce.
Sprinkle each pepper half with 1/4 cup of mozzarella cheese.
Bake at 350 for 20 minutes.
Turn the oven to broil for 2 minutes to brown the cheese.