Great question — answering as the UphillTech team:
If it is instant oatmeal, just add boiling water (ratio water to oats 2/1) and let it sit for 5 minutes. If it not instant, same ratio of water to oats, boil for 5 minutes while stirring, remove from heat, cover and let sit for 5 minutes. I googled "how to cook oatmeal" and found several similiar ways.
Full answer by Tad Jones: https://cooking.stackexchange.com/a/104518 (CC BY-SA 4.0).
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