Preheat oven to 400 degrees F. In a large skillet cook ground beef, onion, and carrot until beef is browned. Drain fat. Stir in chili powder; cook 1 minutes. Add tomatoes; bring to boiling. Reduce heat and simmer, uncovered, 10 minutes or until desired consistency.
Meanwhile, unroll pizza dough on a lightly floured surface. Cut into four pieces (about 6x8-inches each). Lightly oil a baking sheet; place dough rectangles on sheet. Build up edges slightly; prick centers with a fork. Bake 8 to 10 minutes or until golden brown.
Place 1 square on each plate; top with ground beef mixture and sprinkle with cheese. Makes 4 servings.