For lunch, it’s easy to fall back on a sandwich, but discovering a hidden gem is much more satisfying. La Mirage, an unassuming restaurant on F Street, is that kind of place. There’s lots to choose from, including chicken shawarma in salad, wrap, and even pizza form, but for variety and value, go for the chicken shawarma plate, which comes with basmati rice, hummus, and a house salad for $8.99.