Snip the tips off of the okra, then add to a large bowl.
Squeeze lemon juice over the okra and toss to coat.
Pour the olive oil over the okra, then add the chili powder, smoked paprika, onion powder, and garlic powder. Toss to coat, then let sit for 5 minutes, or while the oven preheats.
Spread okra on a parchment paper or foil-lined sheet tray. Sprinkle with potato starch and shake the tray to lightly coat each piece.
Place okra in the oven and roast for 20 minutes, shaking and rotating the sheet tray halfway through. If needed, roast okra until browned and crispy, up to 10 minutes longer, depending on the size of the pods.
When the okra is crispy, remove from the oven and serve warm.