1. Melt butter. Add the ground beef, salt, and pepper and sauté for 2-3 minutes. Add the mushrooms and sauté. Lastly, add the peppers, onions, garlic, worcestershire, and ketchup.
3. In a medium saucepan, melt butter over medium heat. Whisk in the flour until a smooth paste forms. Add the milk and whisk until the mixture begins to thicken.