The recipe specifies russet potatoes, but most commenters recommended Yukon Golds. And some added a little finely chopped onion. I'd do that, I think. A few tried it with sweet potatoes, and reported excellent results.
It needs to cook for a longish time, but evidently you can do the first two cooking periods in advance, and then pop it in the oven for final 30 minutes just before you eat.
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