Elizabeth Falkner's Onion Rings

Place canola oil in a medium saucepan and heat over medium-high heat until it reaches 375 degrees on a deep-fry thermometer.

Meanwhile, in a medium bowl, whisk together rice flour, egg whites, 1 teaspoon salt, beer, and cayenne pepper until smooth. Add onion slices to mixture; toss to coat.

Gently drop coated onions into oil, working in batches if necessary, and cook until golden brown, 1 to 2 minutes. Using a slotted spoon, transfer onion rings to a paper towel-lined plate. Season with salt and serve immediately.