No cooking needed
Add the oats and 1 cup of the water to a blender and blend fast for a couple of minutes then add the rest of ingredients and blend for a further 5 minutes
Stain through a net/muslin cloth then pour into a glass bottle with a good secure lid and place in fridge.
Each time you use your oat milk you will have to shake it first as it settles
Use in tea coffee cereals or milkshakes/smoothys
It keeps well in the fridge for at least 3 days, probably a lot more but it never stays around any longer than that as I only make a litre at a time.