Lemony Lentil & Chard Soup

Name: Lemony Lentil & Chard Soup
Cook time: 55 min
Total time: 55 min
Cuisine: American, Middle Eastern
Ingredients: 3 tablespoons extra-virgin olive oil, plus more for serving; 1 large onion, diced; 1 bunch chard; 4 cloves garlic, finely chopped; 1 tablespoon ground cumin; 0.5 teaspoon Aleppo pepper, plus more for serving; 8 cups water; 1 pound red lentils, picked over and rinsed; 1.5 teaspoons salt; 0.5 cup lemon juice (from 3-4 lemons); Ground pepper to taste