Aubergine Parmigiana

Recipe from Jamie Oliver
ingredients
• 3 large firm aubergines
• olive oil
• 1 onion, peeled and finely chopped
• 1/2 a bulb of spring garlic, if you can get it, or 1 clove of regular garlic, peeled and finely sliced
• 1 heaped teaspoon dried oregano
• 2 x 400g tins good-quality plum tomatoes or 1kg fresh ripe tomatoes
• sea salt and freshly ground black pepper
• a little wine vinegar
• a large handful of fresh basil
• 4 large handfuls of freshly grated Parmesan cheese
• 2 handfuls of dried breadcrumbs
• a little fresh oregano, leaves chopped

optional:
• 1 x 150g ball of buffalo mozzarella