In a medium sauce pot, whisk milk, water, vanilla, salt and spices (cinnamon through cloves) over medium heat. Whisk frequently until mixture begins to bubble around the edges.
Once liquid is bubbling lightly, stir in steel cut oats. Return pot to a boil then reduce heat to low and cook for 15 minutes.
About 2 minutes before the end of cooking time, stir in apples, walnuts, flax and wheat germ.