Savory London Broil
["3 1/2 lb. London broil", "2 Tbsp. red wine vinegar", "2 Tbsp. Worcestershire sauce", "2 Tbsp. soy sauce", "4 Tbsp. ketchup", "1 tsp. minced garlic", "1 Tbsp. oil"]
["Rinse London broil in water; pat dry.", "Place London broil in skillet with oil.", "Brown very well on both sides, over medium heat.", "Transfer beef to a crock-pot."]
["broil", "red wine vinegar", "Worcestershire sauce", "soy sauce", "ketchup", "garlic", "oil"]