Step 1: Prepare the Filling

1. Heat a large skillet over medium heat. Add the ground beef and cook, breaking it into crumbles with a wooden spoon, until browned. Drain any excess grease.
2. Add the onion, green bell pepper (if using), and garlic to the skillet. Sauté for 3-4 minutes, or until the vegetables are softened and fragrant.
3. Stir in the halal-certified ketchup, mustard, Worcestershire sauce substitute, beef broth, and smoked paprika. Reduce the heat to low and simmer for 5-7 minutes, allowing the flavors to meld and the mixture to thicken slightly. Season with salt and pepper to taste.

Step 2: Make the Cheese Sauce

1. In a medium saucepan, melt the butter over medium heat. Whisk in the flour and cook for 1 minute, stirring constantly, to form a roux.
2. Gradually add the milk, whisking continuously to avoid lumps. Bring the mixture to a gentle simmer and cook until thickened, about 2-3 minutes.
3. Remove the saucepan from heat and stir in the shredded halal-certified cheese, garlic powder, and cayenne pepper (if using). Mix until smooth and creamy.

Step 3: Assemble the Sloppy Joes

1. Spoon a generous portion of the beef mixture onto the bottom half of each hamburger bun.
2. Drizzle the cheese sauce over the beef, allowing it to cascade down the sides for a messy, delicious presentation.
3. Add your desired toppings, then place the top bun on each sandwich.

Step 4: Serve and Enjoy

1. Serve immediately with sides like halal French fries, potato wedges, or a simple green salad.