Get your grill going.

Chop it up some more..

Cut the Swiss into small slices

Combine the ground beef, egg, salt, pepper, garlic powder, mustard powder, A1, Worcestershire, and bread crumbs. The nacho cheese looking stuff is optional, it's something called 'Zesty Burger Sauce' and is pretty much Thousand Island with pickle relish.

Time to get your hands dirty, squish it all together. If it doesn't hold its shape, or is too wet, add more bread crumbs.

Flatten out a portion of the ground beef concoction...

then cut it into patties with a cup (or just use your hands). NOTE: Two of these patties will make a whole burger.

Do this until you have no more meat left. If you have too little meat left to make another pair of patties, cook it anyway and feed it to your dog.

Form the burgers:

Place another patty on top..

Seal the edges of the burger with your fingers, then roll the burger into a ball while keeping the insides, well, on the inside. This may take a little practice.

Repeat this step until all of the smaller patties have been turned into MONSTER BURGERS. Note the small burger for our dog.

Put some butter in the pan.

Add onions and mushrooms, then saute over medium heat until onions are soft and clear.

Once the onions are ready, add some cheese to the mix

Nice and gooey.

Throw those monstas on the grill and let them cook for maybe 5-7 minutes on each side. Our grill was really hot, so we only left these on for about 5 minutes total.

Off the grill...

Serve.

Now that you have learned how to make gigantic mushroom swiss stuffed burgers, please be sure to view these other burgers recipes. Also, you will love these American recipes.