1 pkg. Good Seasons Zesty Italian Dressing Mix (6 oz.)
1/4 c. olive oil
1/3 c. tarragon wine vinegar
1/2 tsp. meat tenderizer (optional)
3 to 4 lb. beef chuck roast or thick sirloin

Combine marinade ingredients. Pour small amount (enough to cover bottom) in a 9x13 pan. Place beef in pan; top with remaining marinade. Pierce meat generously with sharp fork; turn meat and pierce again. Cover. Refrigerate for at least 8 hours or overnight, piercing and turning meat often. Before cooking, let beef come to room temperature. Grill over medium coals about 6 minutes per side for medium rare cuts 1 inch thick; 8-9 minutes per side for thicker cuts. Serve with sliced tomatoes and sweet onions.