Stick water and lentils go into a pot and bring to a boil. Chop apple into pieces, some big, some small or all the same size. Once the lentils are boiling, dump in most of the chopped apple (save about 1/4 of it for later) into the pot and sprinkle with cinnamon. Stir around, reduce heat to a low and cook until the lentils are soft (about 10 minutes) Once they are cooked, taste and decide if you need sweetener. If you do, add a teaspoon or two of whatever in now and mix around then,transfer the lentil goodness into a bowl, toss on remaining apple chunks, sprinkle with cinnamon, and go to town.