I've costed out the cheese flan just for my own benefit really but thought I'd post it any way.
1/2 a double pack Jus Rol puff pastry 83p
250g Cheese 99p
2 Onions 10p
2 Eggs 24p
Pinch mixed herbs 1p ?
Salt & Pepper 2p ?
I make it in a large oven tray (the size of the oven shelves) as it has to feed a lot of us. I grease the tray and roll out 1/2 of a double pack of puff pastry thinly to fit the tray. Then score through, but don't cut, around the edges of the pastry on the tray - about 2cms in. Grate the cheese, chop the onions and mix them together in a big bowl. Beat the eggs with salt, pepper & herbs and pour the egg mixture on the cheese mixture and stir to combine everything. Then simply pour it all onto the pastry base and smooth with a spoon so that it just reaches the edges that you've scored. Bake it at Gas 5 for about 20 minutes until the pastry edges have puffed up & the cheese mixture is bubbled & golden.
It may look like a faff but it's so easy and very tasty. Another thing you can do is make individual tarts in exactly the same way but just roll enough pastry (1/6th of the pack probably) for however many you want to make then do the same scoring etc. It can be as expensive or as cheap as you want. I've made it before with roasted vegetables, olives & feta cheese which doesn't make it a cheap family filler any more
Total per flan £2.19 It feeds the 6 of us for our evening meal with 2 portions left for later so 8 servings in all = 27p per serving
I like to serve it with homemade wedges and baked beans - yummy!