Heat up a pan over mild high heat
Once that pan is heated up add the hamburger patties and let them start to cook
Cut the onion in half and the pill of the outside of the onion
Then slice up the onion
You probably will want to flip the patties so that they dont burn but you will want to check
Turn down heat down to medium heat.I like to cook the onion in the fat from the burger, so I will try and get the fat where I can get some oil to put the onions in Let the onions cook and mix them occasionally
Once that hamburger is done then make sure to take it off
Right around now start to get the bread ready if you let it sit too long and gets wet
Onion should be almost done around now and you can lay done the bread and then some cheese and a patty and then some onions and the other piece of bread.
Leave for about a minute then check to see if it is golden brown on the bread if you start to smell it burning then check it sooner and then flip it to the other side once the other side is golden brown
Pill it off and get ready to enjoy