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 the peeled carrots and cook for 10 to 12 minutes until fork-tender but still holding their shape. Drain well and let cool slightly.
03 - Arrange the blanched carrots on the prepared baking sheet. Using the bottom of a sturdy glass or jar, press down firmly on each carrot to flatten it to approximately 1/2-inch thickness.
04 - Drizzle the smashed carrots evenly with olive oil. Sprinkle with kosher salt, black pepper, garlic powder, and smoked paprika. Toss gently to ensure even coating on all sides.
05 - Roast in the oven for 20 to 25 minutes, flipping the carrots halfway through, until the edges are deeply golden and crisped.
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.