Preheat oven to 425 degrees F and line a large baking sheet with parchment paper and set aside.
Slice the sweet potatoes into wedges of even thickness and add to a large Ziploc bag with 1 tablespoon of the starch. Shake to coat, and add the other tablespoon of starch if needed to fully cover.
Add the olive oil, salt, and pepper to the bag and toss to coat. Arrange the sweet potato wedges on the prepared baking sheet in a single layer, do not overlap.
Bake the sweet potato wedges for 23 to 26 minutes, flipping once halfway through roasting.
While the wedges are cooking, combine the softened butter, chile paste, garlic powder, lime juice, lime zest, and sea salt in a large bowl.
Once the wedges have finished roasting, remove from the pan and transfer to the bowl with the butter mixture and toss to coat.
Transfer to a plate and garnish with chopped chives. Serve with lime wedges and sea salt.