Grind up quick oats with a good coffee grinder then mix with water. Ta daa! Oat Milk!
I know this stuff is good because the day after I made it the first time, three people stopped by asking for more. Blender it up with cocoa, fruit, or anything else that might taste good or be good for you.
Step 1: Fine Grind
Set your grinder on "fine". As fine as it will go and still have some powder come out.
Quick Oats are already cooked at the factory. That's why they're quick. They are a good camping or survival food. You can eat them dry or cook them. Either way you can digest them just fine.
Oats are good for other reasons also. It has a lower glycemic index than other grains. That means it's less likely to cause diabetes. If your recent ancestors didn't live on cheeze-whiz and wonderbread, your metabolism isn't evolved to handle it and you're in trouble. For instance Pima Indians all have diabetes due to the "modern" diet. They'd be better off eating their tradtional desert foods instead of modern desserts.
Step 2: Mix and Drink
You can use a blender if you want, and keep adding stuff like frozen bananas. A blender will chew up plain dry quick oats, but it's a lot quicker to grind them first. If you put cooked oatmeal in a blender it will burn out. The non-newtonian gumminess of the boiled oatmeal is too much drag for the motor.
I think it's also too much drag for certain micro-organisms that sometimes live in human intestines.
After I got back from Majuro I had cipro-resistant giardia for almost a year. I lost lots of weight so the dumb American doctors thought I was healthy.
Every patient they'd seen before was sick from overeating and lack of exercise.
What they used to call gluttony and sloth. It's not like that in countries that suffer from our foreigh policy.
Anyway, during that year I ate lots of different types of food trying to gain weight. I found that I could gain weight if I ate large quantities of cooked oatmeal. I think the gumminess of it kept the giardia's flagellae from working properly.