Lentils can be packaged in a variety of ways. For instance, the packages of lentils that I buy just say, “lentils”. They don’t even say “brown” or “green” lentils.   Look inside the bag, and you should see a brownish small pebble looking nugget.   For this recipe, you don’t want to get red or yellow lentils. Those ones break down a lot when they’re cooked, and are usually used in stews like red lentil and artichoke stew and dal.