Place ingredients in the pan of the bread machine in the order recommended by the manufacturer. Select dough cycle; press Start.
Preheat oven to 475 degrees F (245 degrees C). Sprinkle a large pizza pan with cornmeal. Roll or pat dough out on a lightly floured surface until it is the diameter of the pizza pan; place on pan.
Spread dough with sauce, then sprinkle with garlic. Cover with cheese. On top of the pizza, arrange chicken, green pepper, onion and tomato.
Bake in preheated oven for 20 to 25 minutes, or until dough is baked, cheese is melted and toppings are lightly browned.