BBC Food - Recipes - Pasta bolognese and ricotta tortellini with a courgette and garlic sauce

Ingredients

• 200g/7oz '00' pasta flour
• 1 free-range egg and 6 egg yolks
• 50g/1¾oz fine semolina flour
• 2 tbsp olive oil
• 1 small red onion , chopped
• 2 celery sticks, chopped
• 1 garlic clove, finely chopped
• 1 tsp chopped fresh rosemary
• 150g/5½oz beef fillet, cut into strips
• 150ml/5fl oz red wine
• 1 x 400g tin chopped tomatoes
• 50g/1¾oz unsalted butter
• 125g/4½oz ricotta
• freshly grated nutmeg , to taste
• ½ lemon , zest only
• 1 egg yolk , beaten
• salt and freshly ground black pepper
• 1 tbsp olive oil
• 2 garlic cloves, finely sliced
• 1 sprig thyme , leaves picked
• 1-2 large courgettes , grated or sliced into ribbons using a vegetable peeler
• 75g/2½oz unsalted butter
• 150g/5½oz freshly grated Parmesan