Butterscotch Pie

3 cups milk
4 eggs
2 Tbsp. margarine
2 cups brown sugar
2 tsp. vanilla
8 Tbsp. flour

Mix brown sugar and flour together with a fork.  Beat egg yolks and add to milk.  Heat the milk in a heavy pan.  Add the brown sugar mixture any time; the milk doesn't have to be hot.  Cook until thick and boil one minute.  Add the vanilla and about 2 tbsp. margarine.  Cool and beat egg whites to make meringue.  The mixture may curdle a little at first, but continue beating and the curds will disappear as it cooks.