Spicy Lentil and Sweet Potato Stew With Chipotles

Heat the olive oil over medium heat in a large, heavy soup pot or Dutch oven and add the onion. Cook, stirring often, until it softens, about 5 minutes, and add the garlic and a generous pinch of salt. Cook, stirring, until the garlic smells fragrant, about 30 seconds, and add the ground cumin seeds and carrots. Stir together for a minute, then add the lentils, water, sweet potatoes, chipotles, tomato paste, salt to taste and the bay leaf. Bring to a boil, reduce the heat, cover and simmer 40 to 45 minutes, until the lentils and sweet potatoes are tender and the broth fragrant. Taste and adjust seasoning. Stir in the cilantro or parsley, simmer for another minute, and serve, passing lime wedges so diners can season their lentils with a squeeze of lime juice if desired.