What kind of salt, Kosher or Sea salt, should I use to soak my fresh-cut French fries in before frying?

Soaking cut French fries prior to cooking in salt water, using any type of salt, is not recommended. This may seem like a helpful method and can infuse a slight flavor, however, salt is a big factor to the fry oil breaking down prematurely. Keep in mind that cooking oil is by far more costly than anything else in the French fry making process, so I suggest saving the salt for post-frying. Here’s a link with more details on the subject: https://idahopotato.com/dr-potato/when-making-french-fries-at-home-should-i-cut-the-strips-into-water-with-salt-added-is-that-correct-2

And, here's a link to a number of delicious French fry recipes using Idaho® potatoes: https://idahopotato.com/recipes/tag/french-fries

Idaho® Potato Truffle Fries