Ingredients
* 750g sprouts
* 3 tablespoons duck fat or butter
* 1 teaspoon caster sugar
* sea salt and freshly ground black pepper
* 100g smoked streaky bacon, chopped
* 1 garlic clove, crushed
* 1 tablespoon chopped sage leaves
* 1 teaspoon thyme leaves
* 150g soft breadcrumbs
* finely grated zest of 1 orange
* 1 tablespoon chopped parsley
* 100g peeled, vacuum-packed chestnuts, roughly chopped
* 200ml chicken stock