Because the marinade is discarded, we don’t count any Carbs. London Broil is usually served very rare when used on sandwiches, which is one of our favorite ways, with any toppings and sides you prefer.
Mix marinade ingredients in a small bowl (use 2 TBSP oil and reserve the other 1).
Place steak in a large Zip Lock bag, add marinade, swish around, seal and refrigerate for at least 8 hours and up to 24.
Pre heat broiler on high tempersture with top rack 3 – 4 inches below heat.
Rub remaining 1 TBSP olive oil on steak, and place on broiler or rack on a baking sheet.
Slice thinly against the grain and serve with horseradish, buns and any sides or toppings you prefer.