Courgette Gratin ⋆Anne's Kitchen

Ingredients

• 1 onion
• 2 garlic cloves
• 150g carrots
• 350g tomatoes
• 2 tbsp olive oil
• 1 tbsp tomato paste
• 1 tin chopped tomatoes (400g)
• 1 tbsp sugar
• 150ml red wine
• 1 tbsp oregano
• 100g mixed olives
• 60g capers
• 100g sour cream or crême fraîche
• 3 courgettes
• 300g pizza mozzarella
• 2 tbsp breadcrumbs
• 1 tbsp parmesan
• basil, to serve
• salt and pepper