Begin by frying off your aubergines and courgettes on a griddle pan, on a medium heat for 4 minutes on each side.
Slice your sourdough bread through the middle and spread each pesto on either side of the bread.
Layer on your aubergine, spinach leaves, courgettes, chargrilled peppers and top with your buffalo mozzarella. Season with salt and pepper and firmly press the other half of the bread on top!