Now can add the milk,the suger and optional spice e.g. cinnamon (This may change it's color though),or cardamom,raisins if u wish or nuts if you can use them..then simmer abit until start thicken you can add condensed milk and stir in..

Last step is add the knob of butter just as it's cooked already,stir it in..now can add all your fresh berries, roasted nuts of choice (if dint add while cooking),Or just as a garnish..don't forget that very important drizzle of honey which pairs well with the oats flavor!bismillah and enjoy

The plain porridge (without fruits or nuts or honey topings added) can stay in fridge for upto 3 to days