Homemade minestrone

Name: Homemade minestrone
Ingredients: 2 tbsp olive oil; 1 large onion, peeled, sliced; 150g/5½oz streaky bacon, diced; 4 celery stalks, chopped; 2 garlic cloves, peeled, finely chopped.; 2 carrots, peeled, diced; 2 potatoes, peeled, diced; 1 litre/1 pint 15¼fl oz beef stock; 30g/1oz tomato purée; 400g/14 oz canned haricot beans, drained; 1 bay leaf; 1 tsp fresh thyme leaves; handful chopped fresh parsley; 400g/14 oz tomatoes, chopped; 100g/3½ oz spaghetti, broken into 2cm/1in pieces; salt and freshly ground black pepper; 1 crusty white bread loaf, cut into thick slices; 1 tbsp olive oil; 200g/7oz mozzarella, torn