By: Sandy Manual, LDN, RD Ingredients: 2 lb. Flank steak or London Broil or Flat Iron Steak ¼ cup olive oil 1 tbsp. chopped fresh Rosemary ( I used a twig from my herb garden) 2 tbsp. balsamic Vinegar 5 cloves minced garlic 1 tsp salt ½ tsp black pepper   Directions: In a Tupperware…