In my experience such food is usually referred to as "salad" and the dressing is called "salad dressing".
Sometimes a "salad" might have a special name - e.g. A salad with a Caesar dressing is called a Caesar salad.
A salad with apples and walnuts may be a "Waldorf Salad"**.
Salads consisting of very large chunky vegetables may be referred to as "Crudités".
Vegetables chopped very finely and slathered in mayonnaise (or worse, salad cream) may be called "coleslaw".
** note that no Waldorfs are required (with apologies to Basil Fawlty).