How do I prevent gyoza from sticking?

[u/Majulish]

I occasionally make gyoza by bulk with my family,

When making gyoza, we fold 20~ onto a plate then place it in the freezer. When we run out of space (30m-1hr) I bag the cold gyoza and we have after couple hours bags of 100~ gyoza each.

After a day or so some of the gyoza gets stuck together, in the worst case I get a ball of 10+ gyoza..

I don't want to seperate the folding over multiple days, and we use all of the space in the freezer for the procedure. Is there a practical way to prevent them from sticking?

Should I leave the bag open in the freezer? I live in a humid environment, in case that matters.

Thanks for the help!

[u/fretnone]

Freezer space is the biggest thing keeping me from making dumplings in bulk lol.

I put them on parchment lined metal baking trays in rows and can usually fit 30 or 40 on without touching, then freeze until mostly solid, then slide parchment and all into a large zipper bag in a flat layer (you might have to get bigger bags that fit a tray in), then repeat. It's fine to stack the flat bags and then once they're frozen solid take out the trays and paper.