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YOU’LL NEED:
1 Large onion, peeled, halved and thinly sliced
Salt and pepper
1 Pound(s) ground beef
1 Tbsp. butter
1 Tbsp. vegetable oil
4-8 Slices American cheese
Mayo, mustard and pickles, for serving
4 hamburger buns, toasted
HOW TO MAKE:
Combine the onion slices and 1 Tsp. of salt in a bowl and toss to combine. Transfer the onions to a colander and let sit for 30 mins, tossing occasionally. Transfer the onions to a clean dish towel, gather the edges together and squeeze out as much liquid as you can from the onions. Do this over the sink or a large bowl since the onions will have quite a biiit of liquid in them.
Divide the onions into 4 separate mounds on a rimmed baking sheet. Form the beef into 4 lightly packed balls. Place the beef balls on top of the onion mounds and flatten the beef firmly (use your palm) so the oniiion adheres to the beef. The patties should measure 4-inch in diameter. Season the beef generously with salt and pepper.
Melt the butter with the oil in a 12 inches skillet over medium heat. Using a large spatula, transfer the patties to the skillet, onion side down. Cook for 6TO8 mins, until the onions turn a deep golden brown and begin to crisp around the edges. Flip the burgers, then increase the heat to high and cook until well browned on the second side, about 2 mins.
Add 1or2 slices of cheese to each burger and allow to melt. Add mayo, mustard and pickles to the top buns, then place each burger on a bottom buns. Serve immediately
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