Salad in a jar - I don't put any dressing in the jar. If you do make sure its no where near the lettuce. I reccomend not putting the dressing in the jar at all. Your salads will last a little over a week w/o dressing!
Salad in a jar - healthy and easy lunches! -- this works. But it's messy to get it out into a plate because everything is so tight packed. Easier just to pack a salad in a tupperware bowl and include a little jar of dressing.