Steak n Shake used to carry a grilled cheeseburger melt, but it disappeared off the menu during covid, and never came back. It was a grilled cheese sandwich, with a burger patty inside of it along with ketchup mustard and pickles. It did not have onions, but I was thinking grilled onions would be good in it. It was NOT a Frisco melt.
Season burger patties with seasoning of your choice, and sear in a hot skillet. Remove from skillet. If using onions, saute them in the burger grease until softened. Remove from skillet. Drain grease out of skillet but do not wipe it. Butter bread slices on both sides. Top one slice with 1 american cheese slice and a little bit of shredded cheddar, top with burger patty, ketchup, mustard, pickles and grilled onions, top with another slice of american cheese and shredded cheddar. Top with second piece of buttered bread. Cook in skillet as you would a grilled cheese, pressing down sometimes as you cook.
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