My favorite patty melt
An attempt to recreate the MeMe’s Diner patty melt, which of course is impossible because theirs is the perfect sandwich memory and restaurants provide so much more than just food. But this is pretty good.

You'll be eating in: 1 hour, includes 45 minutes to caramelize the onions

Active time: 10 minutes
Yield: 2 sandwiches
Ingredients
- 4pieces of good rye bread, storebought or homemade
- 4tablespoons softened butter
- 1/2lb ground beef (for two ~1/4 lb burgers)
- 8slices American cheese
- 1/2cup caramelized onions
- 1/4cup mustardy comeback sauce
Instructions
Make the caramelized onions
This takes at least 45 minutes, and can be done a day ahead. Slice onions, cook on low heat with butter and salt, stirring frequently until brown. Or follow this recipe.
Grill the bread
Heat a pan or skillet over medium heat. Generously slather each piece of bread with butter, now is not the time to skimp on butter. Place the bread butter side down and top with 2 slices of American cheese. Cook until the bread is browned, about 4 minutes (but may be shorter/longer depending on your pan and burner strength!). The cheese may not be fully melted and that's ok.
Make the burger patties
Heat a heavy skillet over medium-high heat. Form 1/4 lb - 1/3 lb burger patties and generously salt (you want them to be about the same size as your bread, we'll smash them wider but they'll also shrink from cooking). Once the skillet is hot, place the burger patties on the skillet and smash as thin as you can get them. Cook until well browned on the bottoms, about 1 minute. Scrape up the burger to get all the tasty brown bits, flip and cook for another minute longer.
Assemble
Here's the sandwich order: bread, cheese, burger, onions, sauce, cheese, bread. I put the burger and onions on one side, and the sauce on the other for easiest assembly, seen below.
Slice and enjoy
Slice diagonally and serve with your favorite fried potatoes. Don't hold back, really indulge here. Regret not making more than 2 sandwiches.
Notes
There's no other recipe online that I could find, so did some research to supplement my memory. Here's a video of chef/owner Libby Willis making the sandwich (starts around 1:20).
Thank you MeMe's Diner for existing while you did. You can read more about why they decided to close in this interview with the owners. I also encourage you to read this essential piece on customer entitlement during the pandemic.
Variations
For a vegetarian riff, follow the recipe but use Impossible/Beyond Meat or try a broccoli or romanesco reuben.
Substitutions
If you don't like American cheese, I'm sorry but this is not the sandwich for you.