2 cups dry lentils
2 quarts vegetable broth
2 tablespoons extra-virgin olive oil
4 cloves garlic, minced
1 large onion, chopped
2 stalks celery, chopped
1 pound turkey sausage
2 tomatoes, peeled, seeded, and chopped
1 teaspoon ground turmeric
1 teaspoon ground cumin
1/2 teaspoon dried thyme leaves
1 pinch crushed red pepper flakes
sea salt to taste
1 (8 ounce) container plain lowfat yogurt
1/4 cup chopped fresh parsley for garnish