In a 7 quart dutch oven (cast aluminum) pour in ? gallon milk. In a bowl mix 6 egg yolks, evaporated milk, ? cup sugar, and condensed milk together with a mixer. Add this to the pot of milk mixing well. Add vanilla and heat on a low fire for about 45 minutes. Do not let the mixture boil. Make a soft meringue using the 6 egg whites and ? cup sugar. When the milk mixture thickens to a thin custard consistency incorporate the meringe into it using an electric mixer. Cook for another 15 minutes. Stir often while cooking to prevent scorching.