Preheat your oven to 400 degrees Fahrenheit.
In a saucepan, heat the heavy cream with bay leaves, thyme, garlic, nutmeg, salt, and pepper until it’s warm.
Butter a casserole dish, then layer the potatoes in an overlapping pattern, seasoning each layer with salt and pepper.
Remove the cream mixture from heat and pour a little over each potato layer, adding some grated Parmesan too.
Create at least three layers like this.
Bake uncovered for 45 minutes or until the top is golden brown and the potatoes are tender.