Freezer instructions.
After spooning beans into baking dish, let cool. When cool, top with grated cheese. Cover tightly with aluminum foil, and place in a freezer bag. Remove as much air as possible from the bag and tie or seal. Freeze or up to 3 months.
Remove from freezer the day before serving. Baked thawed beans in preheated 350 degree F / 176 degree C oven for 45 minutes. Cheese should be melted with some lightly browned spots, and center of dish should be hot.
The dip can also be prepared a day ahead of time and kept in the fridge. Bake in preheated 350 degree F / 176 degree C oven for 35-40 minutes.