While oil topping can help preserve some foods, it's generally not recommended for besan curry due to its high moisture content and the risk of botulism. Refrigeration or freezing are safer preservation methods.
Besan curry, also known as chickpea flour curry, is a dish with a relatively high water content. While oil can create a barrier against air and some spoilage organisms, it's not a reliable method for preserving moist foods like curry at room temperature. The primary concern is the potential for *Clostridium botulinum* bacteria to grow in anaerobic (oxygen-free) environments, producing the deadly botulinum toxin. Covering the curry with oil creates such an environment. Refrigeration significantly slows down bacterial growth, and freezing effectively stops it. To safely store besan curry, allow it to cool completely, then transfer it to an airtight container and refrigerate for up to 3-4 days or freeze for up to 2-3 months. When reheating, ensure the curry reaches a safe internal temperature of 74°C (165°F).
To prevent freezer burn when freezing besan curry, divide it into smaller portions and wrap each portion tightly in plastic wrap before placing them in a freezer-safe container or bag. This minimizes air exposure and helps maintain the curry's texture and flavor.