Vegetable oil for frying
3/4 cup rice flour
1/4 cup cornstarch
1/4 teaspoon baking soda
salt
1 egg yolk
1 cup chilled seltzer
1 lb. green beans, ends trimmed
1 lemon, halved

Put a large, heavy-bottomed pot over medium heat. Put 3 inches of oil into the pot and heat the oil to 350F, checking the temperature with an instant read thermometer.

Meanwhile, in a medium bowl, whist together the rice flour, cornstarch, baking soda, and 1/4 teaspoon salt. In a second bowl, whisk together the egg yolk and seltzer. Add this mixture to the first bowl, whisking to make a smooth batter.

When the oil is hot, add the beans to the batter a few at a time. Remove the beans from the batter, allowing excess batter to drip back into the bowl. Carefully add the beans to the oil and fry until lightly golden brown, about 30 seconds. With a slotted spoon, remove the beans to a paper towel-lined plate. Repeat this process until all the beans have been fried.

Season with salt and lemon; serve hot.