This would work well with leftover potatoes as well. Soften your cream cheese in the microwave and then add to the Mashed potatoes (works better if the mashed potatoes are hot as well) and stir in the Monterrey Jack and mix well. The potatoes will begin to look very fluffy - even instant ones.
Then I added garlic salt and pepper to taste and put the potatoes into a greased baking dish. Set the oven to 350 and cut your sliced cheese into little pieces or shred regular cheddar and sprinkle the cheese over the top of the casserole. Then place the cut up bacon pieces over the top. I sprayed the top of the casserole with spray butter and baked it for 30 minutes or until lightly browned on top and the cheese is melted. It will be almost like a souffle - really. Enjoy!!! ;o)