Which dish is known for being served cold and includes vegetables?

Salads are specifically known for being served cold and typically feature a variety of vegetables, often combined with ingredients like fruits, nuts, cheese, and dressings. The cold serving temperature is a hallmark of salads, making them refreshing and suitable for contrasting other hot dishes in a meal. They can come in many forms, including green salads, pasta salads, and grain salads, where the freshness of the vegetables is a focal point.

In contrast, soups are generally served hot, and while cold soups exist, they are not the primary association with the term "soup." Stews are cooked slowly with meat and vegetables and are typically enjoyed hot as well. Roasts involve cooking meats and vegetables at high temperatures in an oven, leading to a hot dish as well. This clear distinction in serving temperature and ingredient composition further highlights why salads stand out as the correct answer.