scrub the potatoes - don't peel - it's all good roughage/fiber
slice fairly thingly - 4mm or ¼ inch add to pan - that's #6 on my slicer
wash courgettes and slice roughly 2 ½ to 3 times the thickness - a little over 1cm - add to pan
peel and chop onions into slivers/slices - add to pan
peel the garlic and either crush or blitz and add to the pan - I find blitzing it in a spice grinder - is way easier than using a crusher - but that's just me.
wash and trim the aubergine if using and chope into 2 cm segments - add to pan
cut tomatoes in to segments, then in half and blitz briefly until fairly small pieces but not totally blitzed. Pour over veggies
add the dried oregano, black pepper, half the chilli flakes and pour over the oil.
mix thoroughly with 2 spatulas is easiest I find, and shake level.
set the oven at 200°C fan - you can put the sauteuse if it's metal on the hob on a low flame to begin heating through while the oven warms up - or just put the oven on a little earlier.
put the lid on the pan - or if you're using a deep baking tray, cover with foil. Put in the oven, then cook for 45 minutes. You can turn the veggies over after 25 minutes to baste them - though it's not essential.
remove from the oven and add the halved baby plum tomatoes if using them, and also the halved or quartered olives and sundried tomatoes. There should be a fair amount of juices swilling around. You could also add the beans if you're using them.
Turn over the veggies to mix in the plum tomatoes and olives evenly and return the pan to the oven - but with the lid or foil removed.
Cook for a further 20 to 25 minutes and then sprinkle the vegan feta cheese over the top,
Then scatter the remaining chilli flakes and garlic granules evenly over the dish, and return to the oven for the rest of the time - so it has 45 minutes in total with the lid off.
chop the parsely with the thicker stalks removed fairly finely. A couple of minutes before you serve the dish, sprinkly the parsley over the dish and return to the oven briefly.