Definitely start with 1 minute and increase/watch it. Maybe also keep an eye on it if you're using a different kind of bowl than usual. The timings that work in my bowls and microwave exploded oatmeal all over the place in my parents' bowls and microwave.

But yes, my method is very similar; I don't bother with oatmeal on the stove if it's just me.


Another option is to make overnight oats the night before in a microwavable container and then the cooking time is shorter. Texture is different though, your mileage may vary.