Email to Sher Recipe Categories: sharona's HOME PAGEAPPETIZERS BREAKFAST DESSERT MARINADESDRESSINGS SANDWICHES SUPPER London Broil Marinade List of Ingredients 3 Tbsp. soy sauce 3 Tbsp. wine vinegar 1 tsp. garlic powder 1 Tbsp. butter, melted 1 Tbsp. ketchupRecipe Just mix them together and spread it over a flank steak or London broil.