Brussels sprout gratin – Nine Bean Rows

Ingredients

• 125g smoked bacon lardons
• 1 tbsp duck fat
• 750g Brussels sprouts, shredded
• a pinch of caster sugar
• 250ml cream
• 3 tbsp water
• 150g fresh white breadcrumbs
• 80g Gruyère cheese (or similar), grated
• 50g butter, melted
• zest of ½ orange
• 6 fresh sage leaves, chopped