I'd start with boneless and skinless chicken thighs or breasts. I prefer thighs because they are tastier. Season liberally with salt, pepper, garlic powder, and Italian herbs. Roast in oven or saute in pan in olive oil. You can also cut it up and saute in the same oil/pan as you do your onion and other veges for your sauce. Add remaining ingrediants and simmer for at least 30 minutes to make sure the chicken is cooked thru.