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For the shallots: Heat canola oil in a heavy pot fitted with a deep fry thermometer to 375 degrees.
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Add Wondra flour to a large ziploc bag and sprinkle in shallots.
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Seal bag and shake vigorously until all shallots are evenly coated with flour.
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Remove shallots, gently shaking off extra flour and add to heated oil.
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Cook shallots until golden brown and crispy, about 3-4 minutes.
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Remove shallots from oil and allow to drain on a paper towel-lined dish.
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Sprinkle with salt.
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For the sliders: Evenly divide the ground beef into 8 portions.
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Very gently shape burgers into balls - do not overwork!
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Heat a cast iron skillet over high heat for about 2 minutes or until very hot.
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Brush pan lightly with canola oil.
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Place rounded portions of meat into the skillet and press down with a large spatula until evenly flattened.
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Season with salt and pepper and cook until the edges are browned, about 2 minutes.
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Flip burgers and season the other side with salt and pepper and top with cheese.
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Cook about 2 minutes or until desired doneness.
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Cover pan for a minute to allow the cheese to melt.
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Place each burger on a sliced roll and top with crispy shallots.