Sprinkle chicken with oregano, black pepper, and salt. Heat oil in a large nonstick skillet over medium-high heat. Add chicken; sauté 4 minutes or until lightly browned. Remove chicken from pan; cover and keep warm.
Add onion, green bell pepper, and garlic to pan. Cover, reduce heat to low, and cook 10 minutes or until tender. Add broth, paprika, and tomatoes; bring to a boil. Stir in rice. Cover, reduce heat, and simmer 18 minutes or until rice is almost tender. Stir in chicken; cover and cook 4 minutes or until chicken is done. Stir in red bell peppers and capers. Sprinkle each serving with cheese.