If you are asking "how do I make a sausage and cheese pizza without sausage and cheese," then I'm not sure what to tell you. I focus on the crust which I make myself. It is a basic recipe. I use a cheap propane oven because that is what is in my apartment. I had to learn how to cook the crust, sauce, and vegetables in that oven. I used to make pizzas in an electric oven with a pizza stone, and that is different. All I can say is experiment with temperatures and placement. Maybe you can partially cook the crust and sauce, add the vegetables and move the pizza up to the broiler rack. In my oven I have to put the crust on a cookie sheet on the bottom because that is where the flame is. When the bottom is done, I turn the crust over, put the sauce on it, and add the vegeatables. When the bottom of the crust is done (again), I move the pizza up to the top rack so the vegetables get more time to cook without burning my crust. There is no broiler in my oven, but that is what works for me.
Dave