Lentil Vegetable Soup

Ingredients

• 450g French green lentils
• 600g chopped yellow onions (3 large onions)
• 600g chopped leeks, white part only (2 leeks)
• 1 tbsp minced garlic (3 cloves)
• 60ml good olive oil, plus additional for drizzling on top
• 1 tbsp salt
• 1 1/2 tsp freshly ground black pepper
• 1 tbsp minced fresh thyme leaves or 1 tsp dried
• 1 tsp ground cumin
• 300g medium-diced celery (8 stalks)
• 4-6 medium-diced carrots
• 3 L chicken stock
• 60ml tomato puree
• 2 tbsp red wine or red wine vinegar
• Freshly grated Parmesan cheese