
Ingredients
Ingredients
- 1 1/2 Lb. of Ground Beef
- 2 Large Yellow Onions
- 12 Slices Rye Bread
- 12 Slices Swiss Cheese (or use half Cheddar Cheese)
- 2 Tablespoons of Dijon Mustard
- 1 Tablespoon of Worcestershire Sauce
- Butter
- Olive Oil
- Salt & Pepper to taste
Steps
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Divide meat into 1/4 lb. patties. Use something heavy or the bottom of a pot to smash the patties between parchment paper to about 1/4" thick.
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Turn the griddle on to medium low heat
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Slice onions. Put a tablespoon of butter on the griddle with a tablespoon of olive oil. Add all of the onion slices to the griddle and season with salt and pepper.
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Sauté the onions until they get soft, then add the Dijon mustard and Worcestershire Sauce to the onion and let cook a few more minutes until combined.
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Transfer the onions to a bowl.
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Turn the griddle up to medium high and add the burger patties. Season liberally with salt and pepper. Cook until done, then set aside while you assemble the sandwiches.
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Lay out all the bread slices. Add a slice of cheese, the burger patty, some caramelized onions and top with another slice of cheese. Butter the top and bottom of each sandwich.
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Turn the griddle down to medium low again and add the sandwiches to the griddle. Cook until both sides are browned and serve.