Barbecued Chuck Roast - cooking recipe

Ingredients

1 (3 lb) chuck roast (1 1/2 to 2 inches thick)
1 teaspoon msg or 1 teaspoon meat tenderizer
1/3 cup wine vinegar
1/4 cup ketchup
2 tablespoons oil
2 tablespoons soy sauce
1 tablespoon Worcestershire sauce
1 teaspoon prepared mustard
1 teaspoon salt
1/4 teaspoon pepper
1/4 teaspoon garlic powder

Preparation

Sprinkle meat on both sides with tenderizer (or MSG).
Place roast in a shallow bakng dish (or zip lock bag).
Thoroughly combine remaining ingredients.
Pour over roast and marinate 2-3 hours, turning twice.
Place marinated meat on grill, about 6 inches from heat.
Turn roast and baste with marinade every 10 to 15 minutes.
Grill over medium coals about 35-45 minutes for meduim-rare.