To make sure you have enough apples for the size of the pie dish you choose, fill the dish with apples as you cut them. You want to over fill the dish, because the apples will cook down. You may need more or less than 6 apples depending on the size of the apples and the dish you use. Combine the apples, melted butter, water, flour, sugar and cinnamon in a sauce pan. Whisk the ingredients together before applying heat, to avoid clumps of flour. Simmer over low heat, stir occasionally.