Heat oven to 425°F Spray 12-inch pizza pan or 13x9-inch pan with No-Stick Cooking Spray. Unroll dough; place in pan. Starting at center, press out dough with hands to edge of pan.
Cook pizza dough for 8 minutes, remove from oven after 8 minutes and set aside.
In 10-inch skillet, heat oil over medium-high heat until hot. Add chicken; sprinkle with chili powder, salt and garlic powder. Cook and stir 3 to 5 minutes or until lightly browned. Add onions and bell pepper strips; cook and stir an additional 2 to 3 minutes or until chicken is no longer pink and vegetables are crisp-tender.
Spoon chicken mixture evenly over cooked pizza dough. Spoon salsa over chicken. Sprinkle with cheese.