Eh, now we're getting into keto versus non-keto exercise. They are different. According to some things I've read, a person in deep keto doesn't really need a huge breakfast if they have enough body fat to burn and can burn it. But I like the idea of eating a lot of high-fat food to add extra fuel to the fire, more immediately available calories for the journey's beginning. That makes more sense to me. Then you've got added carbs - bad idea if you are truly in good keto. Good idea of you ride the fence and know you'll switch easily from the carbs to burning fat instead of bonking. But you'd better be VERY confident in your body's ability to shift gears and get a lot of energy from fat. Then there's the carb-addict, who has to keep eating and eating carbs because their body cannot use fat for fuel. Nobody wants to be that guy.
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.