Prepare the aubergine: Preheat the grill to high. Cut the aubergines into 1cm thick lengthways slices, brush with 2 tbsp of the oil pop on a baking sheet and place under a hot grill for 5 minutes each side until they are golden in colour. (You could also do this in a griddle pan but it takes a bit longer to work your way through all the slices.)
Preheat the oven to 180°C fan/200°C/400°F/Gas Mark 6.
Make the sauce: Heat the rest of the oil in a large pan and fry the onion for a few minutes then add the garlic, tinned tomatoes, dried herbs and red wine vinegar, and cook for 10-15 minutes until thickened. Season with a good pinch of salt and pepper.
Time to layer: Spoon ¼ of the sauce into a baking dish then top with ⅓ of the aubergine slices and ¼ of the grated mozzarella. Repeat these layers two more times then top with the remaining sauce and mozzarella.
For the topping: Mix the breadcrumbs, parmesan and olive oil together and scatter over the top.
Into the oven: Bake for 30-40 minutes until the top is golden brown and then leave to rest for 10 minutes before serving with the basil leaves on top.
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