This French lentil salad with grilled goat's cheese is a delicious and satisfying dish. The lentils are cooked until tender and then tossed with a flavorful vinaigrette made with Dijon mustard, red wine vinegar, and olive oil. The salad is topped with slices of grilled goat's cheese, which adds a creamy and tangy element to the dish. It's a perfect salad for a light lunch or dinner, and can be served warm or at room temperature.