Every easy and inexpensive way to make pizza with your choice of toppings. I use to make this all the time when my oldest son was little and money was super tight. For vegetarian, leave off the meat. You can cut the bread into 1/4ths and everyone can top their own.
Cut the bread in half length wise. Spread the sauce, add a little cheese, the build your topping profile. Start with the flat items first, like the meats, and end with the veggies.
Any Chopped Cooked Meats You Like Such As Pepperoni, ham, sausage, hamburger--the sky's the limit
Any Chopped Veggies You Like Such As Olives, artichokes, mushrooms, peppers--again, the sky is the limit
Top with more cheese.
Bake in the oven at 350 for about 15 minutes or until the cheese is melted and browned a little.