Very Green Lentil Soup
1 tablespoon extra-virgin olive oil, plus more for garnish
1 large yellow onion, chopped
2 tablespoons plus 2 cups water, divided
½ cup French green (Le Puy) or brown lentils
4 large green chard leaves
1 medium Yukon Gold potato, scrubbed
6 cups gently packed spinach (about 5 ounces), any tough stems trimmed
2 scallions, cut into 1-inch pieces
2 ½ cups low sodium vegetable broth, store-bought or homemade
1 cup chopped broccoli
½ T cumin seeds, lightly toasted and ground
¼ teaspoon ground coriander
Freshly ground pepper to taste
1/2 cup chopped fresh cilantro
1 tablespoons chopped fresh mint
¼ jalapeno pepper, minced
1 tablespoon fresh lemon juice, or more to taste
Crumbled feta cheese for garnish
Heat 1 tablespoon oil in a large skillet over high heat. Add onions and 1/4 teaspoon salt; cook, stirring frequently, until the onions begin to brown, about 5 minutes. Reduce the heat to low, add 2 tablespoons water and cover. Cook, stirring frequently until the pan cools down, and then occasionally, always covering the pan again, until the onions are greatly reduced and have a deep caramel color, 25 to 35 minutes.
Meanwhile, rinse lentils and pick out any small stones; combine the lentils with the remaining 2 cups water in a soup pot or Dutch oven. Bring to a boil. Reduce heat to maintain a simmer, cover and cook for 20 minutes. Trim the white ribs out of the chard; chop the greens and slice the ribs (keep in separate piles). Cut potato into 1/2 -inch dice. Chop spinach; set aside.
When the lentils have cooked for 20 minutes, stir in the chard ribs, potato, scallions, broth and the remaining 1 teaspoon salt; return to a gentle simmer. Cover and cook for 15 minutes.
Stir in the chard leaves, broccoli, cumin and coriander. When the onions are caramelized, stir a little of the simmering liquid into them; add them to the soup. Return to a simmer, cover and cook 5 minutes more. Stir in the reserved spinach, cilantro, mint, jalapeno and pepper; return to a simmer, cover and cook until the spinach is tender but still bright green, about 5 minutes more. Stir in 1 tablespoon lemon juice. Taste and add more lemon juice and/or pepper, if desired. Garnish each bowl of soup with a drizzle of olive oil and crumbled feta cheese.