Sprinkle the chicken with oregano, salt, black pepper, and paprika. Heat a large nonstick skillet coated with cooking spray over medium-high heat. Add chicken, and sauté 3 minutes or until lightly browned. Turn chicken over; top with bell peppers, rind, and juice. Cover, reduce heat, and simmer for 30 minutes or until chicken is done. Remove chicken from pan. Combine broth and ketchup in a small bowl. Stir ketchup mixture into pan; bring to a boil. Serve pepper mixture with chicken.