I make these often, and always a week or 2 ahead. They may be baked, covered with foil, and frozen. Thaw at room temperature 30 minutes. Bake squares at 350°F for 25 minutes or until thoroughly heated.
I usually multiply the quantities and make a whole bunch of these tasty "bullets". They freeze well and come in handy when I have no time to cook or unexpected company drops by. They would, shaped a little smaller, make a great finger food at a cocktail party. You could make them ahead and reheat them.
These are great little appetizers.
You can freeze them, cook cool and bag.
To re-heat Just remove from freezer, place on cookie sheet and let defrost.
Then warm slowly at 325 frrom5 to 7 minutes..but check them, to not over cook.