Preheat oven to 350 degrees. Spray a medium baking sheet with canola nonstick spray.
Combine the beef, onion, bell pepper, 1/4 cup of the ketchup, the mustard, egg, cornmeal, garlic, oregano, salt, and pepper, mixing just until blended. Form into 6 (2 1/2 x4 1/2 inch) oval loaves. Transfer the loaves to the baking sheet. Spread 1 tbsp of the additional ketchup over the top of each loaf. Bake until centre reaches 325 degrees., 40-45 minutes.