How do you say vegetable salad in English?

As a noun, salad is a countable noun. Its basic meaning includes "salad", "mixed salad of meat, fish and cheese" and "pasta and bean vegetable salad", and the plural form is salad.

Example:

All entrees have salads or vegetables.

All entrees are served with salad or vegetables.

The Grand Hotel seems to have changed little since her heyday.

The Grand Hotel seems to have not changed since she was young.