Chiles Rellenos Gratin

Name: Chiles Rellenos Gratin
Ingredients: 4 poblano chiles; 1/2 cup bell pepper (finely chopped red bell peppers); 3/4 cup corn (fresh corn kernels); 1/3 cup chopped green onions; 1 tablespoon pine nuts, toasted (optional); 2 garlic cloves, minced; 1 1/4 cups pepper jack cheese (crumbled cheese, divided or chipotle jack kicks it up a notch); 2 tablespoons chopped fresh cilantro; 1 teaspoon salt, divided; 15 ounces black beans, divided (one 15 ounce can); 2 tablespoons butter; 1/2 teaspoon ground cumin (or to taste); 1/8 teaspoon ground nutmeg; 2 tablespoons all-purpose flour; 1 chipotle chile, seeded and minced (canned); 1 teaspoon chipotle adobo sauce (optional); 2 cups low-fat milk (2% low-fat milk); 1/2 cup breadcrumbs (dry); Corn chips