Finely chop and saute the onions in margarine in a pot for a few minutes. Add 2 cups of water and the peas. Bring to the boil. Cover and let simmer for 12 minutes if using frozen peas, 18 minutes if using fresh peas. Stir occasionally. Remove from heat and blend the peas in a blender until you get a smooth green soup.

That's it. Serve with cretins if you have them, or dip bread in it. Good, quick, easy and warms you up quickly.