01 - Preheat oven to 425°F. Line a baking sheet with parchment paper and set aside.
02 - Bring a large pot of salted water to a rolling boil. Add peeled carrots and cook for 10–12 minutes until fork-tender but still holding their shape. Drain well and let cool slightly.
03 - Arrange the parboiled carrots on the prepared baking sheet. Using the bottom of a sturdy glass or jar, press down firmly on each carrot to flatten to approximately ½-inch thickness.
04 - Drizzle the smashed carrots evenly with olive oil. Sprinkle with kosher salt, black pepper, garlic powder, and smoked paprika if using. Gently toss to ensure even coating on all sides.
05 - Roast in the preheated oven for 20–25 minutes, flipping the carrots halfway through, until the edges are deeply golden and caramelized.
06 - Transfer the roasted carrots to a serving platter. Finish with chopped fresh parsley and a dusting of grated Parmesan if desired. Serve immediately while warm and crispy.