Add some brown sugar and heavy cream, and you’re in business! That’s how I do it, at least. And I weigh in at the lower percentiles for my height.
It’s all a matter of how much you eat. Make yourself a fantastic little bowl of oatmeal and layer it up. I know, it’s hard to cook a small amount of oatmeal, but on the other hand, it doesn’t cost much if you have to throw some out. Put the expensive ingredients on after you’ve served what you want, not while it’s in the pot.
Also, if you’re traveling through an airport and need breakfast - Starbucks actually has an excellent oatmeal. Everything in the world (nuts, brown sugar, dried fruit, etc.) but no butter, so if you want butter, ask them for it and they’ll give it to you.