Garlic Parmesan Smashed Sweet Potato Rounds

Heat the oven to 400 degrees F. Use about one tablespoon of butter to grease a large sheet pan with a rim. Score the skin of each sweet potato with a paring knife, cutting four evenly spaced lines from tip to tip. This will make it easier to flatten the rounds after baking. Cut into 1 ½-inch-thick rounds. Place the rounds on the sheet pan, cover tightly with foil or another baking pan, and roast for about 20 minutes, until soft when pierced with a paring knife. Remove the pan from the oven, and set the oven on broil. Use a fork to flatten each slice to about a 3/4-inch-thick round.

Melt the remaining butter in a small pan; add garlic and rosemary, and stir for a few seconds. Use a spoon to drizzle a little bit of the butter mixture over the sweet potato rounds. Sprinkle with salt, pepper and Parmesan, and place under the broiler for 2 minutes or so, until crispy and browned. Serve hot.