How do you freeze pre-made bisque heads?

Freeze them on a tray first then vac seal. Since pre frozen they won't mush down when you vac seal.

I'm lazy, I make the boulettes but don't bother stuffing into the heads. Just as tasty, way less work. I freeze the shaped, uncooked boulettes unwrapped on a baking sheet; once frozen, I put them into storage bags. This way, you can take out exactly the amount you need at a time & bake, then add to the bisque.