Preheat the oven to 450°F. Place beef in a large skillet over medium heat. Cook, breaking beef up, until browned, about 7 minutes. Stir in corn and chili powder, and cook until corn is warmed through. Stir in beans.
Place pizza dough on the lightly-oiled reverse side of a baking sheet and press or roll out until it is very thin, and you have an 11x15-inch oval, leaving a 1/2-inch border. Top evenly with beef mixture and sprinkle with cheese. Bake until crust is browned and crisp, and cheese is browned and bubbling, 15 to 20 minutes. Cut into 12 pieces and garnish as desired.