Preheat the oven to 400 degrees Fahrenheit
Roll out 2/3 of the ground beef on a baking pan.
Cut an onion in half and slice thinly as you can.
Spray a skillet with nonstick spray and saut the onions on high heat. Add the seasoned salt. When the onion is tender remove from heat covered till needed.
Slice the tomatoes thin, thin.
Slice the pickle thinly.
Add mustard and ketchup.
Add half the cheese.
Add the onion and pickles.
Tomatoes with salt and pepper.
Now the rest of the cheese.
Spray one of the pieces of wax paper with nonstick spray. Add the rest of the ground beef to it mash it out a bit. Put the top sheet on.
Remove the top sheet very carefully.
Pick up the bottom sheet with the beef on it. Carefully turn it over on top of the stuffed burger. Slowly take the sheet of wax paper of this should be the one that you sprayed with nonstick spray. Seal all around the edges. Put it in the oven for 20-25 minutes.
Take out of the oven and let rest for 10 minutes. I had a little pullageing away of the side I tried to repair before baking. Season the top with seasoned salt to taste.
Toast the hamburger buns. Cut the stuffed burger and stack on a bun.
Serve I hope you enjoy!!
