Preheat oven to 375°F (190°C). Grease a 12-cup muffin tin.
Non-stick spray or oil
In a large bowl, toss sliced potatoes with melted butter, Parmesan, garlic powder, salt, and pepper until evenly coated.
2 ½ lb Potatoes, ⅓ Cup Butter, ¾ Cup Parmesan Cheese, 1 ½ Teaspoon garlic powder, ¾ Teaspoons salt, ¾ Teaspoons Black Pepper
Layer potato slices into each muffin cup, stacking to the top (they will shrink slightly during baking).
Bake 45–55 minutes, until edges are golden brown and centers are tender.
Let rest 5 minutes, then carefully remove from muffin tins. Garnish with extra Parmesan, herbs, or salt if desired.
Fresh or dried thyme