Quorn Bolognese (Veggie Spag Bol with Quorn)

Ingredients

• 1 onion, finely diced ((£0.09))
• 1 aubergine, chopped into small cubes ((£0.69))
• 1 carrot, finely diced ((£0.09))
• 2 celery sticks, finely diced ((£0.46))
• 2 tbsp tomato puree ((£0.37))
• 800 g (2 tins) of plum tomatoes ((£0.56))
• 300 g Quorn mince ((£1.90))
• 3 cloves of garlic, minced ((£0.69/3)=(£0.23))
• 1 bunch of fresh thyme, leaves removed from tough stem ((£0.50))
• 400 g rigatoni ((£0.70))
• Vegetarian Parmesan ((optional))
• 1 tsp mixed herbs
• 400 ml vegetable stock
• 1 tbsp olive oil
• Salt
• Pepper