I planted some kale this year in the hydroponics and it grew well. I decided the best way for us to use it was to make kale chips.
I washed and air dried it. Then chopped it in small pieces. I learned the center piece is a bit tough so cut that section out. Then I tossed it in a little olive oil and sprinkled salt and baked it for about 8-10 minutes until it was crispy and crunchy. I stored it in a plastic tub.
A couple of times it went a little soggy and chewy after a few days, so I just put it back in the oven for a few minutes until it was crispy again.
I think we decided kale is not our favorite and I probably won't plant it again.