01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large bowl, combine the diced potatoes, red onion, and bell pepper. Drizzle with olive oil and toss until evenly coated.
03 - Sprinkle smoked paprika, garlic powder, dried thyme, dried rosemary, kosher salt, and black pepper over the vegetable mixture. Toss thoroughly to evenly distribute the spices.
04 - Spread the seasoned vegetables in a single layer on the prepared baking sheet.
05 - Place the baking sheet in the oven and roast for 35 minutes, flipping the potatoes halfway through, until they are golden brown and crisp on the edges.
06 - Remove from the oven, sprinkle with chopped fresh parsley or chives, and serve immediately.