Heat oil in 12" nonstick skillet over medium-high heat. Add onion and garlic. Cook 2 minutes, stirring occasionally, until mixture is softened.

Add orzo, broccoli and broth. Reduce heat to medium and cover. Cook 6 minutes, stirring occasionally. Add chicken and cook for 6 minutes.

Stir in corn, salt, and pepper, and cook 5 minutes. Remove pan from heat, stir in cheese.