Easy! Mix all of your ingredients in a bowl, add liquid until the oats are a bit runny or to your desired consistency (remember they will thicken overnight).
Place in your fridge overnight, take out the next morning, give it a few stirs and eat and enjoy!
Your oatmeal will thicken overnight, especially if you are using the psyllium husk powder. I recommend slowly adding your liquid while stirring and stopping when it is just a little bit on the runny side if you like it thick, more if you like it thinner.