That's actually a traditional hearty icelandic dish. I like to mix greek yogurt (or icelandic yogurt) in my oats too. I thought I invented it or was the only one basically..come to find out they do this a lot in Iceland..
Sometimes I like to make these really dense porridge dishes...oats, cinnamon, peanut butter, casein powder, greek yogurt, and bananas. Pretty calorically/nutrient dense and really hit the spot.