Food prepared at home can generally never be served in a commercial or regulated food operation unless the operation has received a special variance or exemption. Serving home-prepared food in an operation requires meeting certain strict conditions, including:

• The operation must have received a variance (a special permission) from regulatory authorities.
• The operation must have a HACCP (Hazard Analysis Critical Control Point) plan in place.
• The food prepared at home must contain only non-time/temperature control for safety (non-TCS) ingredients.
• The operation must comply with all other food safety regulations and temperature control requirements.

Without these, home-prepared food is not allowed to be served in a food service operation, primarily due to safety concerns and regulatory standards designed to prevent contamination and foodborne illness.