Swiss Chard and Chipotle Tacos

Name: Swiss Chard and Chipotle Tacos
Ingredients: 2 tbsp. olive oil; 1 medium yellow onion, quartered and thinly sliced; 2 cups thinly sliced cremini mushrooms; 2 garlic cloves, finely chopped; 1 tbsp. soy sauce; 2 canned chipotle peppers in adobo sauce, seeded and finely chopped, plus 1 tsp. sauce; 1¼ cups fresh or thawed frozen corn kernels; 1 bunch chard, cleaned and stemmed, leaves cut into ½-in. ribbons (about 3 cups); Kosher salt and freshly ground black pepper; Warm corn tortillas, coarsely chopped cilantro, sour cream, and lime wedges, for serving