Sweet Corn and Potato Cheesy Chowder

Name: Sweet Corn and Potato Cheesy Chowder
Ingredients: 1 bell pepper diced about 2/3 cup; 1 large onion diced about 1 cup; 2 stalks celery diced about 2/3 cup; 4 cups red potatoes chopped washed but not peeled; 3 cups corn don't add till the end; 4 tablespoons butter; 2 cups chicken broth; 2 cups beef broth; Salt and Pepper to taste - depends on if you use salted butter and low sodium stock. Salt to your taste but I normally add about a teaspoon of salt and 1/4 teaspoon of pepper.; Green Onions and extra cheddar cheese for garnish optional; For the cream sauce; 1 stick of butter 8 tablespoons; 8 tablespoons of flour; 4 cups of whole milk; 2 1/2 cups of cheddar cheese grated