Instant Pot Italian Mozzarella Chicken is a quick and easy chicken dish cooked in a flavorful tomato sauce with melted mozzarella cheese on top. The chicken breasts are seasoned with Italian herbs and spices, then pressure cooked in the Instant Pot with diced tomatoes, garlic, and onion. Once cooked, the chicken is topped with mozzarella cheese and broiled until golden and bubbly. It is perfect for a weeknight dinner and can be served with pasta or crusty bread.