Citrusy Lentil and Sweet Potato Soup

Name: Citrusy Lentil and Sweet Potato Soup
Ingredients: 1/4 cup extra-virgin olive oil; 4 scallions, thinly sliced; 4 garlic cloves, coarsely chopped; 1 teaspoon ground cumin or coriander (or a mix); 1 bay leaf, thyme or oregano sprig (optional — only if you have them); Kosher salt (such as Diamond Crystal); 1 jalapeño, halved lengthwise, seeds removed if desired; 1 medium sweet potato (8 to 10 ounces), peeled and cut into 1/2-inch pieces; 1 cup green lentils; 1 medium bunch chard (8 to 10 ounces); 1/4 cup lemon or lime juice (from 2 lemons or limes)