Preheat oven to 400°.
Spray a 12 hole muffin tin with cooking spray.
Heat cream in a small sauce pan. Add butter and melt. Add garlic, nutmeg, salt, and pepper. Keep warm, allowing the garlic to infuse into the cream, while you prep the potatoes.
Thinly slice the potatoes into 2mm / 0.1″ thin slices. A mandolin come in very handy here.
Layer the potatoes in the muffin tin until about half way up. Top with half the cheese and a teaspoon of the cream mixture. Repeat using the remaining ingredients.
Top with the thyme and bake about 45 minutes until the potatoes are cooked through and nice and crisp.