Cut up the sausage and the onion.

Brown the sausage in a large fry pan or saute pan, until fat cooks out. (Depending on your source for sausage – if there isn’t enough fat to fully grease the pan, add a little olive oil now.) Add the onion, stir to mix with the meat, and saute over low to medium heat until the meat is browned and the onion starts to turn golden.

Add collards. Stir around with the sausage mixture until coated with fat, and let cook, stirring often, until the leaves are a bright green. Add about a cup of water. Bring to a simmer, and let simmer, stirring occasionally, for about half an hour, until cooked to taste.