Instructions

  1. Preheat the oven to 375 degrees F.
  2. Mix the oatmeal, flour, salt, baking powder, cinnamon, and nutmeg well in a large bowl.
  3. Mix the brown sugar, sour cream, egg, oil, and vanilla well in a medium bowl.
  4. Pour the wet into the dry and fold until about halfway mixed.
  5. Add the rhubarb and fold until just combined.
  6. Portion into a greased muffin tin and sprinkle the tops with the sugar.
  7. Bake for about 20 minutes.
  8. Cool in the pans for 10 minutes before removing to a wire rack.