Step 1

Toss onions with 1 teaspoon of salt. Place in wire mesh strainer set over a bowl. Allow to drain for 30 minutes. Transfer onions to clean dish towel, and squeeze dry.

Step 2

Divide onion mixture into 4 separate piles on rimmed baking sheet. Form beef into 4 lightly packed balls; place on top of onion piles. Flatten beef firmly so the onion adheres and the patties measure 4 inches in diameter.

Step 3

Melt the butter with oil in 12-inch nonstick skillet over medium heat. Using spatula, carefully transfer the patties to the skillet, onion side down. Cook until the onions are golden brown and begin to crisp around edges, 8 to 10 minutes. Carefully flip the burgers. Increase the heat to high, and cook the burgers until well browned on the second side, 2 to 3 minutes. Place 1 slice of cheese on each bottom bun. Place the burgers on buns, onion side up. Add desired toppings, and serve.

Step 4

Yield: 4 Oklahoma Fried Onion Burgers.