1. Cut up the mushrooms and spinach.
2. Put the mushrooms into a frying pan with some olive oil and some soy sauce.
3. Cook them for a while, then add the spinach.
4. Put a couple of slices of bread in the toaster and toast them for a few minutes.
5. Then spread the miso on the toast and put the spinach and the mushrooms on the toast.
6. And finally grind some pepper on top.