Corn and Potato Chowder

Name: Corn and Potato Chowder
Ingredients: 2 tablespoons butter; 1 large red bell pepper, diced; 1 large leek, coarsely chopped (see note); 2 cups milk; 3 tablespoons all purpose flour; 3 1/2 cups chicken or vegetable broth; 2 cups frozen sweet corn kernels; 2 pounds red potatoes, cubed; 3/4 teaspoon salt; 1 1/2 teaspoons Old Bay (seafood seasoning); 3/4 teaspoon dried thyme; 1/8 teaspoon ground red pepper (optional for a little extra spice); 3 tablespoons chopped fresh chives, or a sprig of fresh thyme or rosemary for serving