We use one cup of natural whole grain steel rolled branded oats, one cup of skimmed milk and 2 cups of water.
I prefer it in a pan bring it to the boil stirring turn the heat down and stir gently for 3 minutes to stop any lumps forming you can see as it goes thick when its ready.
This will serve two persons with more than an adequate portion, you can add some fresh fruit, or berries 2 tablespoons is usually just the right amount but you can add more.
We go our favorite specialist health store and add a mix of nuts some seeds we prefer, most major supermarkets stock best brands names but check the labels to be sure you buy natural whole grain oats they provide an excellent tasting and nourishing meal.
One large cup full of porridge is an average amount for breakfast for one person, add skimmed milk, you can also add some yogurt and you have a substantial meal, that will provide enough energy to keep you on top form for hours.