I also use a pressure cooker (instant pot) but it doesn't take nearly that long. 3 minutes on high, rest for 10 minutes, vent. I also use 1:3 oats:water and add a splash of half and half when I serve it. I'll usually do a batch of 1 cup oats, 3 cups water, two cut up apples, and a lot of cinnamon. That's four servings and I reheat the leftovers in a microwave with some additional water. I also like to add walnuts when I serve.