Add the ground beef to a large skillet set over medium high heat and cook, crumbling, until completely browned. Strain of grease and set aside.
1 lb ground beef
Add the onion to the skillet and saute until softened. Return the beef to the skillet, add the garlic, stir to combine, and cook for 1 minute.
1 medium yellow onion, 3 cloves garlic
Reduce the heat to medium and season with salt & pepper, to taste.
salt & pepper
Add the remaining ingredients, except for the broth and cornstarch, and stir everything together until evenly combined and the butter's melted.
3 tbsp sliced pepperoncini peppers, 1 tsp worcestershire sauce, 2 tsp ketchup, 2 tbsp butter, 1 1/2 tbsp mayonnaise, 1 tsp apple cider vinegar, 1/4 tsp dried dill, pinch smoked paprika, 1/2 tbsp pepperoncini pepper juice
Whisk the broth and cornstarch together in am small bowl until evenly combined and smooth. Pour into the skillet and stir to combine. Cook, stirring often, just until the mixture's thickened- about 5 minutes.
1 cup beef broth, 2 tsp cornstarch
Spoon onto buns, top with a slice of cheese and extra peppers (if desired).
6 slices provolone cheese, 6 brioche buns
Serve immediately and enjoy!