Begin by pre-lining your casserole dish with heavy-duty
aluminum foil, leaving enough of an overhang on all sides
to cover and seal the food later. Assemble the casserole,
laying it in the lined pan and bake as directed, then cool
to room temperature. Put in freezer just until frozen
(about 1/2 to 1 hour & it's not necessary to seal it up for
this short freezing time). Once the casserole is frozen, use
the excess foil overhang and seal airtight. Double wrap the
foil wrapped casserole in freezer proof plastic bags, label,
date it, then freeze until ready to use.
** To thaw & Reheat **
Remove the wrapping and place the frozen food back into the
dish in which it was baked in, cover and defrost in
refrigerator overnight. When reheating, cover and reheat in
a 350 degree oven. To test for doneness, insert a knife in
the center of the food. When it is hot to the touch when
removed it is hot throughout.