For a truly decadent experience, consider adding a sprinkle of crispy fried onions on top! To make this pizza vegan, substitute the mayonnaise with an egg-free version and use dairy-free cheese shreds. Feel free to customize the toppings with your favorite cheeseburger additions, such as bell peppers or mushrooms. If you don't have pizza dough on hand, use pita bread or naan bread as a substitute.