Use Quart Sized bags and put the different kinds of cheeses in 2 separate bags.
Next, mix together the eggs, flour and milk and pour into another quart sized freezer bag.
Label all bags with “Chile Rellenos Casserole” and staple together the tops so they don’t get separated.
Lay flat to freeze.
On cooking day, make sure all ingredients are thawed before beginning assembly.
Follow assembly & cooking instructions above.