1. Heat a large nonstick skillet over medium-high heat. Add 1 tablespoon oil to pan; swirl to coat. Add chicken to pan; cook 5 minutes or until done, turning once. Remove chicken from pan; keep warm. Add remaining 1 1/2 teaspoons oil, onion, and garlic; sauté 1 minute. Add tomato and remaining ingredients. Bring to a simmer, and cook for 9 minutes or until sauce is slightly thickened, stirring occasionally. Serve chicken with the tomato mixture.