Mexican Chicken Pizza



1 prepared, whole wheat pizza crust
1 yellow tomato, seeded and diced
1 red tomato, seeded and diced
1/2 cup fresh spinach leaves, chopped
1/4 cup thinly sliced red onion
1/2 cup canned black beans, drained and rinsed
1 cup shredded part-skim mozzarella cheese
1 cup shredded sharp cheddar cheese
1 cup cooked chicken, chopped
garnish: fresh chopped cilantro, salsa, sliced avocado, and sliced pickled jalapenos