Margherita Meatball Traybake

Ingredients

• 500 g new potatoes (cut in half or quarters if large)
• 2 red onions (peeled and cut into wedges)
• 2 mixed peppers (deseeded and thickly sliced)
• 500 g passata
• 1 tsp garlic granules
• 1 tsp dried oregano
• 1 tbsp balsamic vinegar
• low-calorie cooking spray
• 125 g ball of reduced-fat mozzarella
• 500 g turkey breast mince
• 1 slice wholemeal bread (made into crumbs)
• 1 medium egg (beaten)
• 20 g grated parmesan cheese
• salt
• freshly ground black pepper