Step 1

Preheat the oven to 425 degrees F (220 degrees C).

Step 2

Toss potatoes, garlic, Parmesan cheese, lemon zest, salt, and black pepper together in a bowl. Drizzle with olive oil and toss again until evenly combined.

Step 3

Heat a cast-iron skillet over medium-high heat. Add butter and heat until melted. Add potatoes; cook and toss until evenly coated with butter, about 2 minutes. Move skillet to the preheated oven.

Step 4

Roast in the preheated oven for 15 to 20 minutes or until soft, tossing potatoes halfway through. Remove from oven and top with parsley.