Nacho Cauliflower Casserole

Name: Nacho Cauliflower Casserole
Ingredients: 1 medium head cauliflower, cored and sliced (1/2-inch; about 6 cups); 1 medium white onion, sliced; 1 large red bell pepper, sliced (about 1 1/2 cups); 1 medium poblano pepper, sliced; 2 tablespoons extra-virgin olive oil; 3 tablespoons lower-sodium taco seasoning; ¼ teaspoon salt; 1 (15 ounce) can no-salt-added black beans, rinsed; 2 cups cooked brown rice; 1 cup frozen corn, thawed; 1 cup chunky salsa; 1 ½ cups shredded Mexican-blend cheese, divided; 3 cups unsalted corn tortilla chips, coarsely crushed; Loosely packed fresh cilantro leaves and tender stems, sliced jalapeño peppers, sour cream and/or lime wedges for garnish