1 tb Melted butter
2    Med Sliced onions
1/4 ts Salt (opt)
2 tb Salad oil
1 ts Fresh lemon juice
2    Crushed garlic
1/2 ts Salt (opt)
1/2 tb My seasoning (follows)
2 lb Scored flank steak

Here is my daughters favorite recipe. I have been making London Broil
this way almost as long as I have been married, and that is over 30 years.
Melt butter in skillet. Cook and stir onions and 1/4 tsp salt in the butter
until onions are tender. Keep warm over low heat. Stir together salad oil,
lemon juice, garlic, 1/2 tsp salt and the pepper; brush on top side of
meat. Set oven control at broil and/or 550~ degrees.
Broil meat 2-3 inches from heat about 5 minutes or until brown. Turn meat;
brush with oil mixture and broil just until rare, 5 minutes longer. Cut
meat across grain at a slanted angle into very thin slices; serve with
onions. NOTE: A can of mushrooms can be added with the onions. Brisket
meat can be substituted for the flank steak. My Seasoning: 1 part garlic
powder, 1 part onion powder, 1/2 part ground black pepper. Mix well before
adding to recipe.