For all the veggie lovers out there, this homemade vegetarian supreme pizza is packed with delicious flavors. Start by preparing the pizza dough using flour, yeast, water, salt, and olive oil. Let the dough rise until it doubles in size, then roll it out into a thin crust. Spread tomato sauce over the crust and top with a variety of colorful vegetables such as bell peppers, mushrooms, onions, olives, and cherry tomatoes. Sprinkle shredded mozzarella cheese over the vegetables. Bake in a preheated oven until the crust is crispy and the cheese is melted and golden. Slice and enjoy a homemade vegetarian pizza that is both healthy and satisfying.