Lindsey, Food Editor replied
Hello,
I’d take it out of the freezer the morning before and put it in the fridge. Then of the day you can re-heat it several ways. In a buttered ovenproof dish, covered with foil, in the oven at 180C (conventional heat) for about 30 minutes. In a saucepan, over a medium heat, covered with a lid for about 20 - 30 minutes (stirring occasionally). Or in a dish, covered with a suitable lid or film, in a microwave for about 3 minutes (stirring half way through).
Kind regards
Lindsey