I’m pretty sure nut butter contains a lot of PUFA. I would stay away from that completely. Veggies are good when you already have a high metabolism. When it comes to casein, high amounts of protein is not a good thing, it lowers the metabolic rate.
EFH book will pretty much explain all the foods to raise metabolism, but for me personally potatoes cooked in coconut oil with salt and cheese has the best warming effect than any other food so far.