Onions may be cut in thick or thin slices to use in a variety of dishes, particularly soups and stews. Sliced onions feature in many salads and can be sprinkled for a fresh garnish. Some recipes may call for onions to be finely diced or chopped.
Peel the onion, trimming the top. Cut it in half, set it cut side down on a board and trim the root.
Hold the onion firmly and cut it in vertical slices, guiding the knife with your bent fingers.