Preheat oven to 375 degrees F

Melt butter in a small saucepan over medium-high. Add you sage and garlic and reduce the heat to medium. Continue to cook for 5 minutes or until the butter just starts to brown, stirring occasionally. Remove the sage leaves and place them on a paper towel-lined plate for later. Discard the garlic and reserve the brown butter.

Place 2 potato slices in the bottom of each of 12 muffin cups. Evenly sprinkle the muffin cups with 1/2 tsp. salt and 1 tbsp. Parmesan cheese. Top that with 2 additional potato slices and 1/2 tsp. of brown butter.

Cover with foil and bake at 375°F for 25 minutes, or until tender. Carefully remove the pan from the oven and discard the foil. Preheat broiler to high.

Drizzle the remaining brown butter evenly over the potatoes and top with the remaining 3/4 tsp. salt and remaining 3 tbsp. of Parmesan cheese.