Saving Onions that froze in storage?

Hi folks - I need some urgent advice on how (or if) I can save some onions that have got frozen in unheated storage.

The situation is that I have about 10 kilos of properly dried loose onions in an unheated and detached garage. Being in Southwest Scotland we have had over a week below zero and the nighttime temperatures have dropped as low as -7.5C with it not rising above freezing all day. I know everything in the garage is frozen as bottles of car cleaning products are solid.

I don't need to know how to prevent freezing in the future but I do need to know if these onions are a write off, whether they are going to be fine or if I should bring them in and try to preserve as many as possible by cooking, drying or re-freezing in bags.

We will have two more days of completely below freezing temperatures before we are forecast a thaw.

Thoughts please?

Sounds good what you have already done, what about fried onions then frozen in portion size packs? Or would they dehydrate then?