1 cup dry brown lentils
1 pound butternut squash, halved, seeded, peeled, and cut into ¾ inch pieces
2 ½ cups vegetable or chicken broth
2 cups water
3 medium carrots, chopped (1 ½ cup)
2 stalks celery, sliced (1 cup)
1 large onion, chopped (1 cup)
2 cloves garlic, minced
1 tsp cumin
¼ tsp ground turmeric
¼ tsp black pepper
olive oil (optional, see below)