Tear the lettuce into bite-sized pieces (or coarsely chop it)

Put the lettuce pieces in the large mixing bowl

Coarsely chop the cucumber and add to the mixing bowl

Coarsely chop the tomatoes and add to the mixing bowl

Coarsely chop the onion and add to the mixing bowl

Cover the top of the bowl with clear wrap

Shake the bowl until the ingredients are mixed

Serve with choice of salad dressing