This is a good model of a recipe that works for a Suppers meeting that combines vegetarians and carnivores as the lentils and lamb are cooked and eaten separately or combined after the cooking is done.
Lentils: Rinse and pick through lentils (they often have stones). Add water to cover plus a half inch. Add kombu, oil, tomato sauce, and 1/2 cup curry base. Simmer until soft, stirring occasionally and adding water if they get too dry. Remove kombu before serving. Add salt to taste. Lamb: To the remaining curry base, add the lamb, stir and brown. Add the tomato sauce and a little water and gently simmer for 20 minutes. The lentils and lamb may be eaten separately or mixed together.