Which food is classified as a time/temperature control for safety (TCS) food?

TCS food refers to food that requires time and temperature control to limit the growth of pathogenic microorganisms or the production of toxins. The FDA Food Code classifiessliced tomatoesas a TCS food. While a whole tomato (Option B) has a protective skin that keeps the interior sterile, the act of slicing or dicing breaks that barrier and alters the fruit's pH and water activity, making the flesh susceptible to the growth of bacteria, particularlySalmonella. Once sliced, tomatoes must be held at $41^{\circ}F$ ($5^{\circ}C$) or lower.

Other examples of TCS foods include milk and dairy products, meat, poultry, fish, shellfish, shell eggs, heat-treated plant foods (like cooked rice or beans), and sprouts. Uncooked rice (Option A) is a dry staple with very low water activity, making it shelf-stable until it is hydrated and cooked. Pumpkin seeds (Option C) are also low-moisture and do not support rapid bacterial growth in their dry state. For a Food Protection Manager, identifying which items on the menu are TCS is vital because these items require the most rigorous monitoring throughout the "Flow of Food." Failure to keep sliced tomatoes or other cut leafy greens refrigerated is a frequent cause of foodborne illness outbreaks and a common citation during health inspections.