Preheat your oven to 425°F (220°C).
Wash and dry the red potatoes thoroughly. Cut them into heart shapes using a cookie cutter or knife.
In a large mixing bowl, toss the heart-shaped potato slices with olive oil, garlic powder, salt, pepper, and fresh rosemary until evenly coated.
Spread the potato hearts out in a single layer on a parchment-lined baking sheet.
Roast in the preheated oven for 25-30 minutes or until golden brown and crispy, flipping halfway through.
Serve immediately, drizzled with additional olive oil or sprinkled with extra rosemary if desired.