Reduce to a simmer. Bring to a boil. Combine first 5 ingredients in a pot and bring to a boil. 2. Puree the soup in … Reduce the heat and simmer for 15 mins with a lid on or until the potato is soft enough to mash with the back of a spoon. 3. Regardless of their shape and color, lentils are high in protein and a good source of iron. Reduce heat to maintain a simmer, cover and cook for 15 minutes. Cool slightly. How to Make Simple Green Soup. Adjust seasonings. Add the lettuce and cook over low heat 5 mins. Simmer uncovered 10 minutes. Why green lentil soup? Add the water, bring to a simmer and continue to simmer, uncovered for 25 mins. Trim the white ribs out of the chard (save for another use, such as to add to a stir-fry or other soup). In general, lentils make a great addition to your meals. Add the peas, stir and cook uncovered, stirring occasionally for 15 mins. Add beans. Press in garlic. The combination of potatoes, carrots and lentils topped with baby spinach is a delightful paring! Meanwhile, combine the remaining 3 cups water and 3/4 teaspoon salt in a soup pot or Dutch oven; add rice. A big bowl of this simple lentil soup is pure comfort. Melt the butter in a large pot. Coarsely chop the chard greens and spinach. DIRECTIONS.