1 In a bowl, put the chestnuts along with the breadcrumbs and sausagemeat.
2 Stir well to mix.
3 In a pan, melt the butter.
4 Add in the celery and onion and fry gently until soft.
5 Add to the bowl along with salt and pepper to taste.
6 Mix in the beaten egg to bind the mixture.
7 Quickly cool the mixture.
8 Transfer the cooled mixture to a rigid container.
9 Seal the conatiner, label and freeze.
10 Thaw in the refrigerator over-overnight.
11 Use like the fresh stuffing.