Slow cooker vegetable lasagne - Good Food Middle East

Ingredients

• 1 tbsp rapeseed oil
• 2 onions, sliced
• 2 large garlic cloves, chopped
• 2 large courgettes, diced (400g)
• 1 red and 1 yellow pepper, deseeded and roughly sliced
• 1 large aubergine, sliced across length or width for maximum surface area
• 400g can chopped tomatoes
• 2 tbsp tomato purée
• 2 tsp vegetable bouillon
• 15g fresh basil, chopped plus a few leaves
• 6 wholewheat lasagne sheets (105g)
• 125g vegetarian buffalo mozzarella, chopped