Lamb Ragu on Fresh Pasta and Kumara Stars - Pasta Vera

Ingredients

• 600 g diced lamb (shoulder)
• 3 tbsp olive oil
• 1 stick celery
• 2 carrots – peeled and chopped
• 1 onion -chopped
• 2 garlic cloves, crushed
• 1 cup red wine
• 2 tablespoons butter
• 2 cups beef stock
• 400g can chopped tomatoes
• 2 sprigs fresh rosemary, plus extra, to serve
• 1 large kumara