Rustic with deep flavor, this stew improves after a day in the fridge. Make the whole recipe, and eat it over several days — or freeze it for later. If you can’t get small Spanish Pardina lentils or French lentilles du Puy, use any size green or brown lentil. (Carnivores may want to add chorizo or jamón.) The stew is rather brothy at first, but thickens upon sitting. Thin with a little water when reheating, as necessary. For optimum results, be sure to use fruity, zesty-tasting extra virgin olive oil — it really makes a difference.