Step 1

Heat oil in a large skillet over medium heat. Add beef and onion; cook, stirring, until the beef is just cooked through, 5 to 7 minutes. Stir in garlic, chili powder, cumin, oregano, salt and pepper. Cook for 1 minute. Add water, pico de gallo, pasta and corn. Bring to a boil, then reduce heat to maintain a simmer. Cover and cook, stirring once or twice, until the pasta is tender and most of the liquid has been absorbed, 13 to 15 minutes.

Step 2

Remove from heat and sprinkle cheese over the mixture; stir until melted. Top each serving with scallions, cilantro, tomatoes and/or sour cream, if desired.