Making orange marmalade is a time-consuming process that requires careful preparation and attention to detail. The first step is to set aside 24-48 hours for the natural pectin in the oranges to set up, ensuring the marmalade will have the right consistency. To prepare the oranges, they must be washed and scrubbed thoroughly before cutting them into halves and passing them through a seedless navel orange. Next, the sliced oranges, along with lemon zest and juice, are combined with water and sugar in a large pot and brought to a boil until the sugar dissolves. The mixture is then cooled before being added to an 8-quart pot with more water, lemon juice, and sugar, along with the drained zest. Everything is cooked together until the marmalade reaches the desired consistency. Altogether, the recipe calls for 5 small navel oranges, 1 medium lemon, and a total of 9 cups of water and 3 ½ cups of sugar.