Air Fryer Roast Beef Stromboli Recipe - Fabulessly Frugal

Ingredients

• 1 pizza crust (I used a thin crust, but you can use whatever type of crust you love)
• 1/2 red or yellow onion (sliced)
• 6 ounces mushrooms (sliced (8-10 mushrooms))
• 1 bell pepper (sliced)
• 12-16 roast beef slices
• olive oil
• 6-8 provolone slices
• shredded provolone cheese (to sprinkle on top, optional)
• 1 egg (for egg wash)
• sprinkle of salt
• 2 tablespoons butter
• 3 tablespoons all purpose flour
• 2 cups milk
• 1/2 cup shredded provolone cheese
• salt and pepper (to taste)