Chicken Parmigiana is a chicken breast dipped in a mixture of beaten eggs, breaded, shallow-fried and topped with a marinara sauce (red Sicilian tomato sauce) and mozzarella. It is then usually baked until the cheese is bubbly and brown. Chicken Parmigiana is commonly served with a side of or on top of pasta. It is also popular as a submarine sandwich. Diced onions or green bell peppers, sautéed or raw, are sometimes added.