01 - Preheat oven to 425°F. Line a large baking sheet with parchment paper.
02 - In a large mixing bowl, combine 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 vegetables. Toss thoroughly to distribute spices.
04 - Arrange the vegetable mixture in a single layer on the prepared baking sheet.
05 - Roast for 35 minutes, flipping the potatoes halfway through, until edges are golden brown and crispy.
06 - Remove from oven, sprinkle with chopped parsley or chives if desired, and serve immediately while hot.