4 oranges, with thick skin
5 cups granulated sugar
Juice of one lemon
Wash the oranges, and by using the fine side of the grater, carefully grate off the skin of the oranges and discard them (picture). Place the oranges in a large pot. Cover with water. Cook at medium-low heat for about 45 minutes until they are softened.
Drain the oranges and put them aside. Then cut off the top and bottom of the oranges. First slice them up, then cut into chunks. Place the sugar in a pot and dissolve it with a little bit of water. Place the oranges over the dissolved sugar. Cook for another 45 minutes at medium heat. Add in the lemon juice, stir. Let it cool down a little bit. Pour carefully into the jars and seal. Store in a dark and cool place.