Yes, rice can be partially cooked and stored for later use, but it's crucial to cool it quickly and store it properly in the refrigerator to prevent bacterial growth.
Partially cooking rice involves cooking it for a shorter duration than usual, leaving it slightly undercooked. This method can save time when preparing meals later. However, uncooked and cooked rice can contain spores of Bacillus cereus, a bacterium that can cause food poisoning. These spores can survive even when rice is cooked, and if cooked rice is left standing at room temperature, the spores can multiply and produce toxins that cause vomiting and diarrhea.
To safely partially cook and store rice:
Cook the rice for about half the usual cooking time. For example, if your rice typically takes 20 minutes to cook, cook it for 10 minutes.
Immediately after cooking, spread the rice out on a clean baking sheet or tray to cool it down rapidly. This helps to prevent the Bacillus cereus spores from multiplying.
Refrigerate the rice within one hour of cooking. Store it in an airtight container in the refrigerator.
When you're ready to use the rice, ensure it's thoroughly reheated until steaming hot all the way through. Do not reheat rice more than once.
To speed up the cooling process, you can rinse the partially cooked rice under cold running water before spreading it out to cool. This helps to remove excess starch and lower the temperature more quickly, further reducing the risk of bacterial growth.