"No special tools required!..."
INGREDIENTS
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1 large yellow onion
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2 c. buttermilk
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1 1/2 c. all-purpose flour
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2 tsp. kosher salt, plus more for sprinkling
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3/4 tsp. baking powder
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3/4 tsp. black pepper
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1/2 tsp. cayenne pepper
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Canola oil, for frying
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1/4 c. mayonnaise
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1 tbsp. ketchup
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1/2 tbsp. prepared horseradish
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1/4 tsp. paprika
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1/4 tsp. kosher salt
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1/8 tsp. black pepper
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1/8 tsp. dried oregano leaves
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Pinch of cayenne pepper