1. Preheat Oven: Preheat your oven to 425°F (220°C). If using a pizza stone, place it in the oven to preheat as well.
2. Prepare Pizza Dough: Roll out the pizza dough into a round shape, about 12 inches in diameter, on a lightly floured surface.
3. Prepare Refried Beans: In a small saucepan, heat the refried beans over medium heat. Stir in the ground cumin, chili powder, and salt to taste.
4. Assemble Pizza: Spread the seasoned refried beans evenly over the rolled-out pizza dough, leaving a small border around the edges.
5. Bake Pizza: Bake for 12-15 minutes, or until the crust is golden brown and the cheese is bubbly and melted.
6. Garnish and Serve: Remove the Mexican pizza from the oven and let it cool for a few minutes. Garnish with chopped fresh cilantro and any optional toppings such as sour cream, guacamole, sliced green onions, or sliced avocado.