Make Ahead: The green lentils can be cooked ahead of time and all the ingredients can be prepped. This green curry lentil recipe only takes 20 minutes to cook so it's best fresh. Leftovers: Any leftovers can be stored in the fridge in an airtight container for up to 4 days. Freeze: Any leftovers can stored in a freezer friendly container for up to 1 month. Reheat: Warm up any leftovers in a large skillet or saucepan over medium low heat until heated through.