Mexican Stuffed Peppers

Name: Mexican Stuffed Peppers
Ingredients: 2 lb Ground Beef; 6 large Bell Peppers; 1 large Onion, chopped; 2 packages Taco Seasoning; 2 small cans Tomato Sauce (8 oz each); 3 cups Cooked White Rice ((optional: cook in chicken broth for extra flavor)); 2 cans Water ((using the tomato sauce cans for measurement)); 1/4 cup Velveeta Cheese ((melted with milk and sour cream for a semi-thick cheese sauce)); 1/4 cup Margarine; 1/2 small Onion, chopped; 1/4 cup Flour; 3 cups Knorr's Chicken Bouillon Broth ((prepared with bouillon and water as per package instructions)); 1 can Mild Rotel Tomatoes ((or Rotel with cilantro and lime, or fire-roasted)); Salt and Pepper (to taste)