Cook oatmeal in normal fashion and when it has absorbed most of the water, add one or a combination of the following:
1 Tbs cinnamon and 1/2 cup raisins
OR
1 Tbs cinnamon and 2 apples peeled and cut into bits
OR
1 Tbs maple syrup
Or
1/4 cup chopped dates and 1/4 chopped walnuts