Romaine hearts consist of the sweet, crunchy inner leaves of romaine lettuce, typically sold trimmed and bundled. Use them in Caesar salads, sandwiches, wraps, or as a sturdy grilling vegetable. Store refrigerated in a perforated bag and use within several days for best texture and flavor. Rinse before use and trim any discolored leaves. Perfect for quick meal prep, family dinners, and healthy snacks.