Spread potatoes evenly on the bottom of the casserole dish and then cover evenly with the cheeses
Whisk the eggs together in a large mixing bowl, and to that add the cream, sour cream, mustard, and spices. Mix together well.
Pour egg mixture over the potatoes and cheese
Bake for 45 minutes until nicely browned and set in the middle
Notes
You can also add bacon, sausage, or ham to this recipe. You can also add onions, and/or peppers. It's the perfect base for any type of egg casserole you want to build.