House Chardo

The food you are referring to is likely "chard" or "swiss chard," which is a type of leafy green vegetable that is commonly used in cooking. It is possible that the term "house chard" is being used to describe a specific dish or preparation of chard that is served at a particular restaurant. Chard has a slightly bitter flavor and is often sautéed or braised and served as a side dish. It is high in vitamins A, K, and C, as well as several minerals including magnesium and iron. Chard is widely available in supermarkets and can be found year-round in many parts of the USA.