I like to use a pizza crust I make in my bread machine, but you can also use a packaged crust mix or a pre-made crust you can find in the store. My bread machine recipe makes enough dough for 2 pizzas so I just double the recipe. One chicken breast also seems to be enough for two pizzas.
The ingredients can be varied to suit your own tastes. Mushrooms and green onions are really good on this.