Step 1

Pick through lentils, discarding any stones. Rinse.

Step 2

Combine the lentils in a small saucepan with 3 cups water. Cover and bring to a boil. Reduce heat to maintain a simmer and cook, covered, until tender, 25 to 30 minutes.

Step 3

Meanwhile, heat oil in a large pot over medium heat. Add onions, carrots, 1/2 teaspoon salt and pepper; cook, stirring occasionally, until golden brown and lightly caramelized, 15 to 20 minutes. Add garlic and coriander; cook, stirring, for 1 minute. Stir in collard greens and cilantro; cook, stirring occasionally, until the greens have wilted, about 1 minute.

Step 4

Add 1 cup of water and cook, scraping up any browned bits from the bottom of the pan, for 30 seconds. Add the lentils and their liquid, potatoes, lemon juice and the remaining 4 cups water and 1/2 teaspoon salt. Bring to a boil over high heat. Reduce heat, cover and simmer until the potatoes are tender, 12 to 14 minutes.

Step 5

Serve with lemon wedges, if desired.