Romaine is a type of leafy green lettuce known for its long, crisp leaves and sturdy texture. It is commonly used in salads, particularly in the popular Caesar salad, and can also be grilled or used in sandwiches. Romaine is rich in vitamins A, C, and K, making it a nutritious addition to meals. This lettuce variety thrives in cooler weather and is typically harvested in the spring and fall. Romaine is often found in grocery stores and farmers' markets, and it can be enjoyed fresh or cooked. Its crunchy leaves add a refreshing element to various dishes.