Betel leaves are heart-shaped leaves commonly used in Southeast Asian cuisine. They have a slightly peppery and aromatic flavor that adds a unique taste to dishes. Betel leaves are often used as a wrap for various fillings, such as minced meat, seafood, or vegetables. They can also be used in salads, soups, or stir-fries. These versatile leaves are known for their medicinal properties and are believed to aid digestion and freshen breath.