Heat a large skillet over medium heat. Add a drizzle of oil. Start by sautéing onions and green peppers slowly. Don’t rush this step—this is where sweetness develops. Cook until soft, fragrant, and slightly golden.

Add garlic and stir for another 30–60 seconds until aromatic.

Add ground beef to the pan. Break it apart using a spatula. Let it brown properly before stirring too much—this creates deep flavor.

Season with salt, pepper, and paprika. Stir occasionally until fully cooked and no pink remains.

Stir in tomato paste, Worcestershire sauce, and mustard. Mix until beef is evenly coated.

Pour in beef broth gradually. Let everything simmer gently for 8–12 minutes until the mixture thickens into a rich, glossy sauce.

At this stage, the kitchen should smell deep, savory, and slightly tangy.

Lower heat and layer cheese slices directly over the beef mixture. Cover the pan for 2–3 minutes so the cheese melts fully into the sauce.

Then gently fold it into the mixture. This step is what transforms it from “good” to unforgettable.

Lightly butter the buns and toast them in a pan or oven until golden and slightly crisp on the edges. This helps prevent sogginess and adds texture.

Spoon the hot cheesy beef mixture generously onto each bun. Don’t be shy—this is meant to be hearty and overflowing.

Serve immediately while warm and gooey.