Vegetable lasagne

Ingredients

• 1 tablespoon olive oil
• 1 small onion, finely chopped
• 1 clove of garlic, finely chopped
• 100g mushrooms, sliced
• ½ red pepper, finely sliced
• 1 courgette, sliced
• 1 x 227g can chopped tomatoes
• 2 tablespoons tomato purée
• 1 teaspoon dried mixed herbs
• 1 teaspoon cinnamon
• 1 vegetable stock cube
• 1 x 210g can butter beans
• 1 x 210g can chickpeas
• 1 heaped teaspoon cornflour
• 150ml semi-skimmed milk
• 25g reduced-fat cheddar cheese, grated
• ¼ teaspoon mustard powder
• 150g lasagne sheets