I experimented with oatmeal tonight, cut with rice to lower the P and K.
2 Tbsp steel cut oats
2 Tbsp 7-grain cereal (mix of grains for hot cereal)
1/4 cup Calrose rice
4 cups water
1 Tbsp cream cheese
largish pinch of salt
brown sugar
cinnamon
Put it all in a small pot on medium heat, bring to a simmer. Turn heat down to low or medium-low, stir often for 15 minutes or so. When it starts to thicken, add the salt, cream cheese, cinnamon, and sugar. Cook another 10-15 minutes (taste it towards to end to see when it's done).
I topped mine with chocolate chips.