Step 1

Preheat oven to 425°F.

Step 2

In a large pot of salted boiling water, cook the potatoes until fork tender, about 15-20 minutes. Drain and allow potatoes to cool slightly.

Step 3

Transfer the potatoes to a large rimmed baking sheet. Use a potato masher or the bottom of a measuring cup or glass to press down on the potatoes to smash them.

Step 4

Drizzle the olive oil on top of the potatoes, add the garlic, rosemary, parmesan cheese, salt and pepper, and toss with your hands to combine.

Step 5

Bake for 15 minutes until the bottoms are golden. Use a spatula to flip them and add more salt, pepper and olive oil, if desired. Return to the oven for 12-15 more minutes until the potatoes become crispy.