Find your self a largish jar with lid of around 750ml – 1L (1 – 2 pints)
Add your salad dressing to the jar first.
Now gradually layer the ingredients keeping the order from above to ensure the soft greens and onion are not touching the dressing.
Once the jar is full, close the lid and store in the fridge. You will be amazed how long the salad will stay fresh. I often make a weeks worth of salad on a Sunday afternoon so I have quick snacks during the week.