Fry onions in "butter" until translucent. Add juice from can of clams. When it boils, add the potatoes. Cook no more than 5 minutes after the liquid starts to boil. Add clams on top of potatoes, but do not stir. Cook 3 minutes exactly. Cool, divide into 4 freezer containers and freeze. When ready to heat, add to each freezer container: 2 C low-fat milk, 1/2 C powdered milk, 1/2 tsp salt, and 1/2 tsp pepper. Heat and eat.