Grilled Marinated Chicken Breasts
["3/4 c. fresh lemon juice", "3/4 c. vegetable oil", "1/4 c. minced onion", "1 1/2 tsp. salt", "1/4 tsp. thyme", "2 Tbsp. green peppercorn mustard", "12 skinless boneless chicken breast halves"]
["In a medium bowl whisk together the lemon juice, oil, onion, salt, thyme and mustard.", "With a sharp knife, score both sides of each breast in a crosshatch pattern, about 1/8-inch deep.", "Pour 1/3 of the marinade into a shallow glass bowl.", "Add half the chicken in a single layer and cover with another third of the marinade.", "Put in the remaining breasts and cover with remaining marinade.", "Cover and refrigerate 3 hours.", "Bring chicken to room temperature.", "Preheat broiler and grill chicken 3 minutes each side."]
["lemon juice", "vegetable oil", "onion", "salt", "thyme", "green peppercorn", "chicken"]