Vegan moussaka

Fruit and vegetables

1 small aubergine (around 250g/9oz), cut into roughly 1cm/½in slices

150g/5½oz chestnut mushrooms, roughly chopped

1 large courgette (around 225g/8oz), trimmed and cut into roughly 1cm/½in slices

2 garlic cloves, crushed

½ tsp dried mint

1 onion, finely chopped

2 sweet potatoes (each around 225g/8oz), peeled and cut into roughly 1cm/½in slices