Brussels Sprout, Red Onion and Bacon Crumble

Ingredients

• 675 g (1 1/2 oz) Brussels sprouts, trimmed and cut in half
• knob of Irish butter
• 1 large red onion, thinly sliced
• 2 cooked slices bacon, diced
• 200 ml (7 fl oz) cream
• 50 ml (2 fl oz) milk
• good pinch freshly grated nutmeg
• 50 g (2 oz) fresh white breadcrumbs
• 25 g (1 oz) walnuts, chopped
• 1 teaspoon chopped fresh flat-leaf parsley
• salt
• and freshly ground black pepper