Cut the beef and vegetables into bite-sized pieces.
Heat olive oil in a pan and stir-fry the beef.
Add onion, bell pepper, and corn, and stir-fry together.
Season with salt, pepper, and minced garlic.
Warm the tortilla in a pan.
Place the sautéed beef and vegetables, cheese, and salsa on top of the tortilla.
Roll up the tortilla and place it on a plate.