Flank is a working muscle, and it eats like one — lean, long-grained, built for a marinade and a hot pan rather than a slow reverse sear. Give it twenty minutes in something acidic, then sear hard and fast; if you cook it past medium-rare, the texture tightens up. The real technique is the slice: thin, and dead against the grain, which turns a chewy cut into an easy one. Great for fajitas, a steak salad, or anywhere you want maximum beef flavor without a big price tag.