This soup goes from basic to sophisticated by using french lentils and seasoning with the elegant and unique french espelette pepper. French lentils are a variety of green lentils with a nutty and peppery kick, as well as a slightly earthy flavor. They also tend to hold their shape well in a recipe like this. The ingredient that gives this soup its distinctive flavor is espelette pepper. This is a variety of pepper that's cultivated in the french commune of espelette in the french basque country. It offers a mild heat and distinctive flavor. If you can't find espelette pepper in your local grocery store, it can be ordered online or found in french specialty stores. You won't regret adding this gourmet ingredient to your spice cabinet. Alternately, smoked paprika is a delicious substitute in this recipe. This classic french recipe is prepared quickly and easily by using the instant pot. There is no need to soak the lentils and the soup cooks on high pressure for only 15 minutes. It also calls for vegetable broth, so it's vegetarian and vegan. Be sure to serve this lentil soup with warm, crusty french bread. For added elegance, it pairs well with white or red french wine such as a sancerre or pinot noir.