Chop your onions, finely, and place in a medium-high skillet with a splash of olive oil. Saute until translucent.
Add Ground Beef and cook until browned. Drain Excess Grease. Add Seasonings to Taste.
Place Ground Beef and Onion Mixture into a bowl and add Ketchup and Mustard. (You can add your pickles too here, if everyone's a fan).
Lay your wrapper out like a diamond on a flat surface. (The corner furthest from you will be corner 1, corner 2 will be to the left, and corner 3 will be to the right. The corner closest to you will be corner 4). This will ensure that it closes properly when you roll it up.
Spoon (1-2 TBSP) of your ground meat mixture into the wrapper, add toppings--cheese, pickles, etc to the top. (Try to keep this below the line between corners 2 and 3).
Using your finger, or a small brush, spread some of the egg wash along the edges of your wrapper from corners 2 to 1 and then from 1 to 3.
Begin folding your wrapper-- start by folding corner 4 towards corner one..make sure to tighten up the mixture as you're doing this. Then, fold over corner 2 and then corner 3. Be sure that your egg wash keeps both corners sealed. Then roll it all towards corner one.
Repeat Step 7 until all of your mixture and toppings are used up.
Brush the remainder of the eggwash over the tops of your wrappers.
Add them to your air fryer and cook for 8-9 minutes at 370.
Serve with a salad, or some fries/tots/onion rings (or both!) And Enjoy!