Roasted Corn Chowder with Country Cheddar Cheese

Name: Roasted Corn Chowder with Country Cheddar Cheese
Ingredients: 6 ears fresh sweet corn, brushed lightly with butter and grilled or broiled until toasted on all sides (about 3 cups cut corn); 2 tablespoons unsalted butter; 1 large onion, peeled and diced (about 1 cup); 2 celery stalks, diced; 1 leek, split, cleaned and diced; 1 large sweet red pepper, diced; 2 teaspoons ground cumin; 1 teaspoon ground coriander; 1/2 teaspoon salt; 1/2 teaspoon cayenne pepper; 2 quarts chicken stock; 8 ounces white or yellow cheddar cheese, preferable extra-sharp, grated