01 - Preheat oven to 425°F and line a large baking sheet with parchment paper.
02 - In a large bowl, toss halved baby potatoes with olive oil, kosher salt, black pepper, minced garlic, finely chopped rosemary, and chili flakes if using, ensuring all pieces are well coated.
03 - Spread seasoned potatoes in a single layer, cut side down, on the prepared baking sheet. Roast for 30 to 35 minutes, flipping halfway through, until edges are golden and crisp.
04 - While potatoes roast, combine fresh ricotta cheese, lemon zest, extra-virgin olive oil, salt, and black pepper in a small bowl. Stir until smooth and fully integrated.
05 - Transfer roasted potatoes to a serving platter. Spoon ricotta mixture over potatoes and garnish with additional fresh rosemary. Serve promptly.