- Heat olive oil in deep 12-inch skillet over medium-high heat and brown chicken. Remove chicken to paper towel-lined plate.
- Cook peppers and onions in same skillet, stirring occasionally, 3 minutes.
- Stir in sauce. Return chicken to skillet.
- Bring to a boil, reduce heat, cover and simmer over medium-low heat 15 minutes or until chicken is thoroughly cooked. Serve garnished with grated Parmesan cheese, if desired.
Tip: If using bone-in chicken thighs, increase simmer time by 10 minutes or until chicken is thoroughly cooked.