1/4 c. butter2 large sweet potatoes, peeled and chopped3 large carrots, peeled and chopped1 apple, peeled, cored, and chopped1 onion, chopped1/2 c. red lentils1/2 tsp. minced fresh ginger1/2 tsp. ground black pepper1 tsp. salt1/2 tsp. ground cumin1/2 tsp. chili powder1/2 tsp. paprika4 c. vegetable broth
Plain yogurt
Melt the butter in a large, heavy bottomed pot over medium-high heat. Place the chopped sweet potatoes, carrots, apple, and onion in the pot. Stir and cook the apples and vegetables until the onions are translucent, about 10 minutes.
Stir the lentils, ginger, ground black pepper, salt, cumin, chili powder, paprika, and vegetable broth into the pot with the apple and vegetable mixture. Bring the soup to a boil over high heat, then reduce the heat to medium-low, cover, and simmer until the lentils and vegetables are soft, about 30 minutes.
Mash slightly with a potato masher or use a stick blender to puree the soup to the desired consistency. Serve with yogurt for garnish.