Preheat your oven to 450°F (230°C).
Trim the stems and tips off each okra pod, then slice them in half lengthwise.
Place the sliced okra in a large bowl.
Drizzle olive oil over the okra, then sprinkle in the garlic powder, salt, and pepper.
Toss everything together until the okra pieces are evenly coated.
Line a baking sheet with parchment paper and spread the okra out in a single layer.
Roast in the hot oven for about 20 minutes, shaking or stirring once halfway through.
After roasting, lower the oven temperature to 175°F (80°C) and crack the oven door slightly to let moisture escape.
Return the okra to the oven and bake slowly until completely crisp, about 3 hours.
Remove from heat and let cool for about 10 minutes before serving.
