making scalloped potatoes, need to be in oven for 3 hours,what temperature should I have them on
I found a recipe for slow baked potatoes that has the potatoes in the oven for 3 hours set at 350F. According to the author:

"The accepted practice is to bake potatoes for an hour. But here's how long to bake a baked potato if you want it to be nutty and soft: three hours, yes, that's no typo, it really is 'three' hours. The skin and flesh are both completely delicious when slow-baked for a long time."

Recipe here.

However, I am unsure whether this theory holds true for scalloped potatoes. Most scalloped potatoes recipes I came across had the potatoes being baked in the oven for ~1 hr at ~350F.