Yes, boiled vegetables should be cooled to room temperature before refrigerating to prevent raising the refrigerator's temperature and promoting bacterial growth. Cooling them quickly also helps preserve their texture and flavor.
Placing hot boiled vegetables directly into the refrigerator can significantly raise the internal temperature of the fridge. This temperature increase can create a favorable environment for bacteria to multiply, potentially spoiling other food items. Furthermore, the heat from the vegetables can condense inside the refrigerator, leading to increased humidity and further promoting bacterial growth. Cooling the vegetables before refrigeration also helps to maintain their quality. Rapid cooling prevents them from becoming mushy and helps to retain their vibrant color and nutritional value. A good method for cooling vegetables quickly is to spread them out on a clean baking sheet or place them in a shallow container. This allows for faster heat dissipation compared to leaving them in a deep pot. Once they reach room temperature, they can be safely transferred to an airtight container and stored in the refrigerator.
To speed up the cooling process, consider using an ice bath. Place the boiled vegetables in a colander and submerge the colander in a bowl filled with ice and water. This will rapidly lower the temperature of the vegetables, minimizing the time they spend in the danger zone (between 40°F and 140°F) where bacteria thrive.