Red Onion and Charred Cauliflower Tacos

Ingredients

• 1 10- to 12-oz. package fresh cauliflower florets
• ½ of a medium red onion, thinly sliced (1 cup)
• ¾ cup jarred chipotle salsa, divided
• 1 15-oz. can no-salt-added black beans, rinsed and drained
• ¾ cup frozen roasted corn, thawed
• 8 6-inch corn tortillas, warmed
• 1 cup shredded red cabbage
• ½ cup sliced scallions
• ¼ cup chopped fresh cilantro
• Lime wedges