Real Dictionary

salad bar in American English
a buffet, as in a restaurant, at which diners may assemble a salad for themselves from an assortment of ingredients
noun: an assortment of salad ingredients, condiments, and dressings displayed on a serving table or counter, as at a restaurant, so that one can choose and combine ingredients freely

salad bar in British English
noun: a counter in a restaurant or other place where food is sold at which a range of salads is displayed, often for self-service