I like to marinate Flank Steak overnight before cooking with olive oil, salt, pepper, rosemary, garlic, and either Red Wine Vinegar, or Balsamic. The Balsamic can be a little strong but is great when I am in the mood for it. Sometimes we roll, stuff, and grill it, other times we just grill it, and slice it on the bias, serve it with salad and grilled vegetables.
Flank Steak is incedibly simple, and it tastes great.
One Flank Steak
Red Wine Vinegar
Marinate the Flank Steak overnight and grill on the BBQ till done to your liking. Flip only once, and once top with pesto. Slice on the bias, or against the grain.