β 1 lb (450g) ground beef (or ground turkey)
β 1 tablespoon olive oil
β 1 small onion, diced
β 1 green bell pepper, diced
β 1 teaspoon salt
β Β½ teaspoon black pepper
β Β½ teaspoon garlic powder
β Β½ teaspoon smoked paprika (optional)
β 1 tablespoon Worcestershire sauce
β Β½ cup (120ml) beef broth
β 1 tablespoon cornstarch (or flour, for thickening)
For the Cheese Sauce:
β 1 cup (120g) shredded provolone or mozzarella cheese
β Β½ cup (120ml) heavy cream or milk
β 1 teaspoon Dijon mustard (for extra flavor, optional)
β Β½ teaspoon salt
For Serving:
β 4 soft sandwich buns or hoagie rolls
β 2 tablespoons butter (for toasting the buns)