1. First of all, we can clearly tell you, skillet this kind of food can be eaten raw, so even if it is not cooked when frying, eating will not be poisoned, then in the case of non-essential, skillet can not blanch with water can be directly do dishes.
2. Kohlrabi can be blanched with water when cooking, but also can not blanch with water, then blanch with water for the purpose of it, not because of its toxicity, but just because if you do not grow their own vegetable field out of kohlrabi, but from the supermarket to buy back the kohlrabi, it may be applied to a lot of fertilizers, as well as other chemical raw materials, and these materials simply with cool water to wash is no way to wash off, so the time of this is not the time of this. The way to wash off, so this time many people think of a way is to put the pot full of water, will boil the water will be skillet into it, blanching, so that with the help of high temperature can be better to remove skillet in the residual chemical raw materials. In addition, there are some people may dislike kohlrabi has a bitter taste, so choose to blanch with water to remove this bitter taste in the kohlrabi, in fact, this is also a very good way, but do not think that kohlrabi bitter people, or feel the trouble of the people, you can also omit to this step, there is no great impact.
Kohlrabi practices vary, and so do kohlrabi steps, but kohlrabi, even without blanching in water, does not affect human health.
Extended reading: kohlrabi kohlrabi recipe