Steve Burton's Oven Barbecue Chicken Breasts Ingredients: 4 skinless, boneless chicken breasts, with the fat trimmed 2 Tbsp. Dijon mustard Juice from two lemons 3/4 cup prepared barbecue sauce salt and pepper to taste 1. In a small bowl, mix lemon juice, mustard, and barbecue sauce. 2. Put chicken in a glass dish. Cover with marinade. 3. Cover chicken with plastic wrap and refrigerate three hours. 4. Remove chicken from marinade and place in shallow pan. Bake at 350 degrees for 45 minutes, or until cooked.