Preheat your oven to 350 degrees Fahrenheit and line a baking dish with parchment paper. Grease your paper well.
Lay the chopped potatoes down in a single layer on your parchment paper.
Crumble and break apart your sausage and spread in a thin layer across the potatoes.
Add the eggs to a small mixing bowl then add the whipping cream and garlic, onion, thyme, salt and pepper. Beat well then pour over your entire casserole.
Top with the shredded cheese. If you’re adding peppers or bacon, add them on top of the cheese.
Bake at 350 for 25-30 minutes depending on the temperature of your oven. It is done when the meat is cooked, eggs are set and cheese is bubbly.