Seasoned cast iron skillets are best, because they impart flavors similar to those in a dinner grill. Turn one burner to medium heat.;
, Slice it into rings. A quarter of an onion per sandwich is required.
 of butter in the first skillet. You can also use olive oil or canola oil in place of butter.
 Stir them around until they are covered in oil or butter. Then, allow them to cook without stirring for 10 minutes.
 Let them cook without stirring on this side for 10 minutes.
 Adjust the temperature to a low setting. Stir them occasionally until they appear caramelized, approximately 15 minutes.
 (113g) of ground beef in a bowl. You will need one-quarter lb. per patty melt.
, Grease it with cooking spray. Press the patty into the bottom of the rectangle container to form a patty that will cover your entire slice of bread.
 Add two tbsp. (28.4g) of butter or oil to the skillet when it is heated.
 Your pressed patty should be ready to cook.
 Leave it until a crust starts to form, approximately two minutes later.
 Give it two to three minutes to cook on the other side. When it is done, place it on a plate nearby., Make sure there aren’t any burned bits that will change the taste of your sandwich.
 (28.4g) of butter on medium heat.
 Stack in this order: piece of rye bread, slice of Swiss cheese, burger patty, caramelized onions, slice of Swiss cheese and slice of rye bread.
 Grill one side until it is golden brown. Remove it and place it on your plate.
 (28.4g) of butter. Flip the sandwich and grill the other side in the butter.

Set two heavy skillets on your stovetop.
Cut an onion in half.
Melt two tbsp.
Place your onion rings in the skillet.
Flip the onions onto the opposite side with a spatula.
Turn the onions again.
Place one-quarter lb.
Add salt, pepper, and a few dashes of Worcestershire sauce to the bowl and mix the ingredients together.

,
Find a rectangle shaped Tupperware container to use as your patty shaper.
Heat the other skillet to high heat.
Flip your container upside down and pat it onto a plate.
Add the patty to your heated skillet.
Flip the patty with a spatula.
Clean one of your skillets with a paper towel.
Heat two tbsp.
Assemble the sandwich.
Add the sandwich to the skillet.
Melt two more tbsp.
Remove it when both pieces of bread are toasted golden brown and the cheese has melted.
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