Step 1

To stuff the lotus roots: Peel each lotus root and then wash well. Remove both ends and cut the lotus root into 1/4-inch-thick slices (about 32 slices, if possible). Soak the slices in a large bowl of cold water to prevent the lotus root from turning black and remove some of the starches.

Step 2

Add the ground pork, Shaoxing wine, 1 teaspoon of the potato starch, 4 teaspoons of the soy sauce, 2 teaspoons of the toasted sesame oil, 1 teaspoon of the sugar, 1/4 teaspoon kosher salt, the ground white pepper and the chicken bouillon powder if using to a large bowl. Add all the scallion white parts and half of the green parts and 3 tablespoons cold water, and stir in one direction until the mixture is combined and very sticky, 3 to 5 minutes. Set the filling aside.

Step 3

Drain the lotus root slices and arrange them in pairs of similar-size slices on a sheet of paper towel. Pat dry with a second paper towel. Spoon 2 tablespoons of the pork filling on 1 piece of each pair of lotus root slices. If there is leftover pork filling, evenly divide it among the slices. Top the filling with the remaining lotus root slices to make sandwiches. Gently press them together so the pork fills the holes of the lotus roots on both sides; smooth the filling around the edges.

Step 4

To fry the lotus roots: Fill a wok or a Dutch oven with about 1 1/2 inches frying oil (about 4 cups for a wok) and heat it over medium heat to 300 degrees F. Set a cooling rack in a baking sheet. As the oil is heating up, lightly dust the outside of the stuffed lotus roots with flour.

Step 5

Mix the batter by whisking the flour, baking powder, baking soda, five-spice powder, 1/3 cup potato starch, 1/2 teaspoon kosher salt and 1/2 teaspoon sugar in a medium bowl until combined. Slowly drizzle in the seltzer and whisk until the batter is just smooth and resembles the consistency of a crepe batter. If the batter is too thick, add a tablespoon of cold seltzer at the time until it reaches the right consistency. Stir in 2 ice cubes to keep the batter cold.

Step 6

When the oil is ready, one at a time, dip a stuffed lotus root into the batter to coat and then carefully lower it into the hot oil. Repeat with more stuffed lotus roots so you are frying 7 to 8 pieces at a time, regulating the heat to bring it back to 300 degrees F. Cook, gently moving the lotus roots so they don't stick to the bottom, until light golden, 5 to 6 minutes (you aren't cooking them all the way through because they will be fried again). Remove from the oil using a spider or slotted spoon and set on the prepared baking sheet to drain. Repeat with the remaining stuffed lotus roots. (The lotus roots will turn soggy after a few minutes, that is normal.)

Step 7

Increase the heat to high heat and bring the oil to 350 degrees F. Fry half the stuffed lotus roots until dark golden brown and very crunchy, 4 to 6 minutes. Remove them to the prepared baking sheet and repeat with the remaining stuffed lotus roots.

Step 8

To make the dipping sauce: Whisk together the remaining 1 teaspoon sugar with 1 tablespoon water in a small bowl until dissolved. Add the white vinegar, chili crisp, sesame seeds, remaining 2 tablespoons soy sauce, 1/4 teaspoon toasted sesame oil and green parts of the scallions.

Step 9

Serve the lotus roots warm with the dipping sauce.