1 carrot, peeled, finely grated
1 courgette, trimmed, finely grated
2 garlic cloves, crushed
1 onion, roughly chopped
1 small onion, finely grated
1 sweet potato, peeled, cut into chunks
1 x 400g tin chopped tomatoes
1 bay leaf
salt and freshly ground black pepper
freshly ground black pepper
1 tsp dried oregano
2 tbsp sunflower oil
2 tbsp tomato pur茅e
1 large free-range egg yolk
4 tbsp milk
100g/3陆oz grated mozzarella or cheddar
500g/1lb 2oz lean beef mince
1 slice bread, crust removed, torn into small pieces