Southwest Beefy Rice & Quinoa Skillet

1 package UNCLE BEN’S® 5 Grain Medley, Quinoa Pilaf

2 tablespoons vegetable oil

1 small onion, diced

1 pound ground beef

1 cup frozen corn

1 cup diced tomato, 1 medium or 2 roma

1 (14.5-ounce) can black beans, drained and rinsed

3 tablespoons taco seasoning

1 cup cheddar cheese