And, of course, the Stephan I'm referring to, Stephan Guyenet, is not only not fat, but rather lean near as I can tell.
But in his recent interview with Chris Kresser, Stephan discussed what he eats. Stargazey summarized it in the comments:
Stephan eats foods that are less processed, processed in traditional ways and gently heated.
Breakfast: 1-2 medium potatoes with butter or palm oil, 1 gently cooked egg, sauerkraut or a raw carrot, a handful of almonds or hazelnuts. Or a sourdough buckwheat pancake instead of the potato.
Lunch: 1-2 microwaved potatoes, grassfed ground beef or lamb or chicken, cooked gently with greens & onions and without spices or salt but with herbs.
Dinner: Potatoes or sweet potatoes, beans or lentils (soaked 24 hours before cooking with seaweed) with 50/50 white & brown rice also soaked beforehand, fish, a salad with vinaigrette (or fresh vegetables), cow or goat dairy (usually fermented), almonds or hazelnuts, fruit, and sometimes a small glass of wine.
He drinks herbal tea, but has no caloric beverages or snacks between meals.
He estimates that he eats 50% carbs, 35% fat and 15% protein.
I think there might just be some brain matter on a few computer screens around the low carbosphere. I'm not at all surprised by this "revelation" as even though I've not thoroughly gone back in his archives, I've listened to a few interviews he's done and never got the impression he was anything resembling a low carb practitioner or enthusiast.
Now, back to eradicating the ravages of insulin from my body!