Serves 6
2 tablespoons canola oil
1 medium onion, chopped (about 1 cup)
2 medium carrots, peeled and chopped
2 medium celery ribs, chopped
1 bay leaf
1 garlic clove, minced
1 1/2 teaspoons curry powder
2 cups dried brown lentils, picked over and rinsed
2 medium sweet potatoes (about 1 pound), peeled and cut in 1/2-inch dice
1 package (9 ounces) frozen cut green beans
1 (14 1/2-ounce) can diced tomatoes in juice
1/2 cup chopped fresh cilantro leaves
Coarse salt and black pepper
Plain low-fat yogurt, for serving