I have to be honest, I got this idea from Quaker Oats.
Many years ago, Quaker Oat came out with various flavors in its variety pack. I would take one plain pack and mix one of the flavored ones into it for my son. He loved it.
So, I found it cheaper to buy a gallon plastic container. One quart box of Quaker Oats. A cup of cinnamon, nutmeg, raisins, chopped dry banana chips and pecans. Mix all of this in the gallon container and shake well to mix. Sometimes I make plain Oatmeal with a 1/4 cup of chocolate chips and dried strawberries. Yes, it is a little work, but much cheaper than the instant.
In a sauce pan, I use a teaspoon of honey, two drops of almond oil, pat of butter and a pinch of sea salt. Let warm and then stir in your oatmeal.
For Diabetics, cut your spices, dry fruit in half and do not use honey. You can also forgot the fruit if you wish honey.
While the nuts are a nice touch, if you are allergic to nuts, do not add.
And for the record, I love Oatmeal cookies.