Rinse the green onions and pat them dry
Trim off the root ends
Remove any wilted outer layers
Place the onions on a cutting board
Hold the onions together in a small bunch
Use a sharp knife to slice across them
Cut straight down for thin rounds
Cut on a diagonal for longer pieces
Separate the white and green parts if needed
Chop to the size your recipe requires
Use the chopped onions immediately or store them chilled