This can be assembled the night before, or it can even be assembled, then frozen. If you assemble the night before, just take it out of the fridge and bake. If you freeze it, make sure to wrap it tightly (it will keep for 2-3 months), then let it thaw in the fridge for 2-3 days then bake. I do not recommend baking then freezing, as the tots do not hold up well.