Of course. Cheese makes everything better. You can use a slice of American cheese or add some cheddar on top. Sprinkle some grated parmesan onto the cooked egg. Other tasty cheese options are mozzarella, feta cheese, or swiss. Goat cheese will also work if you like a softer cheese with a good flavor. Try this recipe with different types of cheese. Each type that you add will give the tomato egg rings a different flavor and you might be surprised which one you like best.