Preheat your oven to 400°F (200°C). Gather all your ingredients, chop the garlic, dice the onion and green pepper, and butter your burger buns.

Slice the hamburger buns in half and spread a thin layer of butter or mayo on the cut sides. Toast them in the preheated oven for about 5 minutes.

In a large skillet, heat 1 tablespoon of olive oil over medium flame. Add the ground beef, diced onion, and green pepper. Cook for about 5-7 minutes.

Stir in the chopped garlic and cook for an additional 2 minutes. Combine the beef broth, cornstarch, and beef bouillon in a cup and pour into the skillet.

Add the ketchup, Worcestershire sauce, Dijon mustard, and all remaining seasonings to the skillet. Let the mixture simmer for 5-7 minutes.

Once thickened, stir in the cheddar cheese until it melts and combines with the meat mixture.

Spoon a generous portion of the beef and cheese mixture onto the toasted buns. Top each with a slice of provolone cheese.

Return the assembled sandwiches to the oven and bake for approximately 10 minutes or until the provolone cheese is bubbly and golden.

Serve hot with a side of crunchy potato chips or a fresh salad.