Real Food Fast. 100% Gluten Free Kitchen. Slow Braised Meats. Vegan Options. Order in person, online, or by phone. Take in or dine out. Mensa is a dedicated gluten-free restaurant on Long Beach Island that serves chef-inspired dishes made from scratch daily. Whether you're dining in, taking out, or ordering delivery, Mensa has something for everyone, from salads and bowls to tacos and sandwiches.