Deep-fried cheese curds are cheese curds that are either battered or breaded, then deep-fried. Some cooks do beer-batter crusts on them.
They just need deep-frying for a minute or less. Breaded ones can be broiled or grilled instead (turn several times to ensure even browning.)
They are often served with a dip, such as ranch dressing or ketchup.
Deep-Fried Cheese Curds are sold at fairs and carnivals in Northern Illinois, Iowa, Upper Michigan, South Dakota and Wisconsin, etc. They are also offered at bars and fast-food restaurants. Nation-wide in America, they have appeared on menus at A&W and Culvers.
You can buy Deep-Fried Cheese Curds at some grocery stores already breaded, in bags, ready for frying at home. In some American states, at the grocery stores, you can also buy batter mixes especially for cheese curds.