Google for some paleo recipes. We use whey or soy quite a bit to make paleo treats for backpacking trips. You can easily add it to muffin mix or loaf mix or whatever you are into. Take the toxic gluten out by using almond flour or coconut flour (very fibrous).
You can also make a paleo oatmeal for breakfast by using ground flax (or linseed as it is called in Oz), protein powder, and then throw in some dried fruit if you like, toss a few nuts on top, and, if you really lucky you can find some powdered coconut milk that doesn't have sugar added.