The Foreman Grill works best for boneless chicken breasts and thighs no thicker than 3/4 inch, particularly those that lie flat and smooth. However, you can cook. Toss chicken breast with olive oil, Italian seasoning, salt and pepper. Preheat George Foreman Grill for 5 minutes with lid closed. Place chicken on grill; cook for 6 to 8 per side minutes or until cooked through.