This is how I do it
polly . The posh way is to slice the aubergines thicker and griddle them on both sides, but my way is quicker, and tbh, tastes fucking amazing without the griddling.
2 x tins tomatoes
handful of chopped fresh basil
3 or 4 garlic cloves
tomato puree
2 x medium aubergines
2 packs fresh mozzarella
2 or 3 handfuls of finely-grated fresh parmesan
Warm chopped/minced garlic in a bit of olive oil, add tomatoes and a spoonful of tomato puree. Add chopped basil, stir, season with salt and pepper, simmer for 5 minutes.
Wash aubergines and slice from end (in discs) about 3 to 5mm thick.
In a deep oven dish, put some of the tomato and basil sauce in bottom, cover with a layer of aubergine, then sauce. Then layer ripped up bits of the mozzarella over the sauce, and cover with a layer of aubergine. Then sauce, moz, aub etc…
Continue layering and finish with final layer of aubergine then sauce. Cover with a good thick layer of the parmesan. This turns into the ‘crust’.
Bake in centre of pre-heated oven (gas mark 5) for about an hour until crust turns goldeny brown. You can do it for longer if you want. The crust never seems to taste burnt, and I've made this pissed a few times, so it's been forgotten about now and again