However, eating it raw isn't really recommended. Once it is cooked, it can also be eaten cold, so if you want to throw it in a sandwich, wrap, or salad, there's no need to reheat it either. Whichever ...
But if you deep-fry it, the heat may reduce some of the isoflavones. Tempeh is a popular meat alternative in sandwiches, salads, and stir-fries, but you can also serve it as a main dish.
Try starting with a simple approach, cutting the tempeh into thin slices and seasoning it before frying in a pan. That way it makes for a great sandwich filling or a nice side. Crumble up tempeh and ...