Ingredients
Method
Preparation
- Preheat oven to 400 degrees F. Split buns and lay them cut side up on a large baking tray. Lightly brush the cut sides with softened butter or mayonnaise for crispier/more flavorful buns. Bake for 5 minutes to toast the buns.
Cooking
- Heat 1 tablespoon olive oil in a large cast iron skillet over medium-high heat. Add beef, onions, and bell peppers, cooking until the beef is browned and onions are softened, about 7 minutes.
- Add garlic and sauté for 30 seconds.
- In a liquid measuring cup, whisk the beef broth, cornstarch, and beef bouillon together until smooth. Add to the meat mixture, followed by ketchup, Worcestershire sauce, Dijon mustard, and all seasonings.
- Gently simmer over medium heat, stirring occasionally, until most of the liquid has been absorbed, about 5 minutes.
- Stir in the sharp cheddar cheese until melted. Taste and season with salt, pepper, and red pepper flakes.
- Divide the mixture between the bottom toasted buns and top each with a slice of provolone cheese. Bake at 400 degrees F for 5-10 minutes or until cheese is completely melted.
- Serve immediately!
Notes
Common mistakes include skipping the toasting step, not allowing enough time for the sauce to thicken, and forgetting to season your filling. Pro tips: mix in additional veggies, use a broiler for extra crust, and make a larger batch for leftovers.