Prepare and fill jumbo shells as for baking, but instead of baking immediately, arrange filled shells on a parchment-lined baking sheet and flash-freeze until solid. Transfer frozen shells to freezer bags with sauce layered between or stored separately. Label and freeze up to 3 months.
To bake from frozen:
Freezing tips:
This method gives you ready-made comfort food that heats up with fresh-baked texture.