Prepare a bowl of acidified water by adding vinegar, lemon juice, or citric acid to a bowl of cold water. It should be pretty sour.
Peel and slice the 200 grams lotus root into 1/16-inch thick slices and add it to the bowl of acidified water to keep the lotus root from discoloring.
Bring a large pot of well-salted water to a boil and add the lotus root. Let the water return to a full boil and cook the lotus root for another 1 minute. Add the 50 grams snow peas during the last 20 seconds.
Drain and vegetables well and then add them to a bowl. Add the 1 teaspoon toasted sesame oil, ½ teaspoon rice vinegar, ½ teaspoon ginger juice, ¼ teaspoon salt, and White pepper and toss to coat evenly.