Materials:    3 tablespoons olive oil, more for drizzling  teaspoon ground cumin  2 garlic cloves, minced  Juice of 1/2 lemon, more to taste  1 cup red lentils  1 tablespoon tomato paste  3 tablespoons chopped fresh cilantro.  1/4 teaspoon kosher salt, more to taste  1/4 teaspoon ground black pepper  Pinch of ground chili powder or cayenne, more to taste  1 quart chicken or vegetable broth  1 large carrot, peeled and diced  1 large onion, chopped1       Preparation:   1.  In a large pot, heat 3 tablespoons oil over high heat until hot and shimmering. Add onion and garlic, and sauté until golden, about 4 minutes.   2.  Stir in tomato paste, cumin, salt, black pepper and chili powder or cayenne, and sauté for 2 minutes longer.   3.  Add broth, 2 cups water, lentils and carrot. Bring to a simmer, then partially cover pot and turn heat to medium-low. Simmer until lentils are soft, about 30 minutes. Taste and add salt if necessary.   4.  Using an immersion or regular blender or a food pro...