Raisins can be put in a small handful when cooking porridge, or you can make your own oil tea, almond tea.

The raisins are the grapes dewatered, and once boiled in the porridge, they will restore the fullness of the watery look and the sweet and sour flavor.

It can also be eaten dry.

I like to eat it dry, I think it is quite delicious.

All in all how you eat it is fine, it all works, it's up to you how you like it that way.