Chipotle Lentil–Stuffed Sweet Potatoes

Name: Chipotle Lentil–Stuffed Sweet Potatoes
Ingredients: ½ small red onion , sliced thin; ¼ cup distilled white vinegar; 1 small jalapeño chile , stemmed and sliced thin; 4 small sweet potato (8 ounces each), unpeeled, pricked all over with fork; 1 (15-ounce) can lentils , rinsed; 1½ tablespoons minced canned chipotle chile in adobo sauce; 1 teaspoon ground cumin; 1½ teaspoons table salt , divided; ¼ cup Mexican crema; 2 ounces queso fresco , crumbled (½ cup); 2 tablespoons chopped fresh cilantro