These Steak Roll Ups are juicy and tender, stuffed with sautéed vegetables. Flavored with a balsamic marinade, this recipe is delicious the whole way through. Flank steak or skirt steak is recommended for this recipe. You don’t need an expensive variety of steak, just a thinner variety that will easily wrap around the vegetables. If using top round steak, pound the steak with a mallet to make it flat and easy to wrap.