While pasta is cooking, brown and crumble ground beef and onion over medium heat in a large skillet. Drain and return to skillet.
Add garlic powder, chili powder, corn, tomatoes and salsa. Stir to combine and then heat on low until warmed, about 4-5 minutes.
Once pasta is cooked and drained, add to meat mixture. Stir to combine. Add shredded cheese and stir until melted. Top with additional cheese, if desired.