This Red Lentil Coconut Soup is Easy and Delicious

Name: This Red Lentil Coconut Soup is Easy and Delicious
Cuisine: Asian
Ingredients: 2 tablespoon vegetable oil; 1 small onion, diced; 2 medium carrots, peeled and diced; 2 tablespoon curry powder; 2 garlic cloves, minced; 1 tablespoon ginger, peeled and minced; 1 tablespoon brown sugar; 1/4 cup tomato paste; 1 cup red lentils; 3 cup water; 7 ounce coconut milk; 1/3 cup cilantro, chopped; 3 tablespoon sour cream (optional)