Peel the lotus root.

Using a mandolin, thinly slice the lotus root crosswise into 2-3mm thick rounds. Place the sliced lotus roots into the ice water.

Drain the lotus roots and pat dry each slice. Discard the ice water.

Arrange the slices on a microwave safe plate.

Microwave on high for 2 minutes. Remove the root from the microwave and turn each slice over.

Microwave on high another 2 minutes. Remove the root from the microwave and turn each slice over again.

Microwave an additional one minute. Check crispness of the slices. They should be crunchy and lightly browned. If needed, microwave another minute.