There are many different ways to use a zucchini spiral slicer, and the way you use it will depend on the type of slicer that you have. Some basic ways to use a spiral slicer include using it as a vegetable peeler, Julienne slicer, or chipper. You can also use it to make ribbon-like slices, which are perfect for garnishing dishes. If you're looking to make vegetable noodles, the easiest way to do this is to cut the ends off of your zucchini (or other vegetables), then place it in the spiral slicer so that the widest part of the vegetable is facing down. Gently press down on the top of the vegetable while turning the crank handle. You'll need to apply a little bit of pressure in order to get the vegetable to slice evenly. As you continue to turn the handle, you'll notice that the vegetable will start to form into noodles. You can make them as thick or thin as you like, but I recommend keeping them on the thicker side so that they don't turn to mush when cooked.Once you've finished slicing your zucchini (or other vegetable), you can cook it in a variety of ways. My personal favorite way to cook noodles is to sauté them in a little bit of olive oil over medium-high heat until they're soft. You can also add them to soups or stews, or even eat them raw.