my suggestion would par-broil them in the microwave first for about 5 minutes. Then maybe another half hour in the oven wrapped in foil
or peel and cut into 1 inch chunks and bake until slightly brown maybe 20 minutes
or slice into 1/2 "Disks" and bake for 10, flip and bake for 10-20 minutes more until browned
@Kinnison @JeSsA I wonder if they'd cook faster hasselback style? Or maybe like this?
https://www.harbourbreezehome.com/roast-sweet-potato/