Puy lentils, also known as French green lentils, are small, dark-green lentils that are popular in Mediterranean cuisine. While puy lentils are the most well-known name for this type of lentil, there are a few synonyms that can be used interchangeably. These include green lentils, black lentils, and beluga lentils. These lentils have a peppery flavor, which pairs well with earthy, hearty ingredients like garlic, onions, and mushrooms. They're also a great source of protein, iron, and fiber, making them a nutritious and filling addition to any meal. Whether you call them puy lentils or one of their synonyms, these versatile legumes are a great ingredient to have in your pantry.