Combine the chili powder, salt and pepper; rub over both sides of chicken. In a large nonstick skillet, cook chicken in oil over medium heat for 4-5 minutes on each side or until juices run clear. Remove and keep warm.
Add the beans, corn and salsa to skillet; bring to a boil. Reduce heat; cover and simmer for 2-3 minutes or until heated through. Transfer to a serving dish; top with chicken.