The lotus root slices blanched in a few minutes to cook mainly depends on the thickness of the lotus root slices, if the lotus root slices cut relatively thin, 5 minutes or so can be cooked, if the lotus root slices cut relatively thick, you need to extend the time appropriately, 10 minutes or so to be able to, but need to pay attention to is that, if it is a cold lotus root slices, you don't need to blanch lotus root slices to cook, just blanch lotus root slices for 2 minutes can be.