To hollow, or core, an apple use a corer, knife, or a grapefruit spoon. Make a circle around the stem, then dig out apple insides, layer by layer. Get rid of seeds (pips), and seed pockets while leaving apples thick and juicy. Then flip them around and remove the bottom-most part with seeds, called calyx. To prevent the apple from falling apart dig in small motions instead of one or two big scoops. For this stewed apples recipe, it's best if you don't dig a huge hole all the way through, but it's ok if you do.