Cauliflower is a firm, compact head of edible white florets attached to a thick stalk. It can be roasted, steamed, boiled, riced, or eaten raw in salads and dips. Often used as a low-carbohydrate substitute for grains and potatoes, cauliflower pairs well with spices, cheeses, and sauces. Store refrigerated and use within a week for best quality before cooking or serving.