This morning I tried grapefruit in my oatmeal, based on this grapefruit oatmeal recipe. A few days ago I made a big batch of oatmeal so I figured today would be a good day to try this experiment because if it wasn't very good tasting, I had more oatmeal waiting in the fridge that I could heat up.
I used half of a pink grapefruit and cut the sections as if I was going to eat it with a spoon. I scooped it into my oatmeal bowl and aimed to get only the fruit out and not a lot of juice since I prefer my oatmeal on the thicker side. I stirred it in and the fruit broke up into the little juicy pockets that make up citrus fruit. I warmed it for 2 minutes, and added cinnamon and my standard "milk" float (non-dairy creamer + almond milk) on top.
I would have taken a photo, but it pretty much looked like my regular oatmeal except there were some barely-discernible pink-ish bits in it. The taste was fine, but I really couldn't taste the grapefruit, which is weird because it's usually quite tart and strong. It might be that since I squeezed the rest of the juice into a bowl and added a drizzle of honey and ate that first that my mouth was already used to the tartness. So not like I wouldn't recommend it, but I don't really see a reason to do it. I'll probably use the other half of the grapefruit in another bowl of oatmeal, though. It's nice to know you're getting some good vitamin C in your bowl.
So this was another successful bowl of oatmeal. I think my only oatmeal experiment that I didn't like and threw away was the egg version. You crack an egg into your oatmeal and cook it in, and it turns thick and custard-y, it was way too eggy for me.