Filo is good if you like it, almond pastry is almost zero carb and has a better nutritional profile in terms of minerals and omegas but is much higher fat in general so it depends on what your objectives are. I use both on occasion and they both taste good 🙂
Kaylz I dont eat fish so I make the quiche with same egg mix but I use veg and tomatoes or roasted garlic or something tasty, all of them come out very nicely. For pie filling I use flour as a thickener either with an olive oil bechamel base for chicken etc or for red meat I would use the stock from the meat with an olive oil and flour base to thicken. There's not enough flour in there to be concerned about unless your aiming for an extremely low carb diet, but the options Martin gave would all work as an alternative. I use a white sauce alternative involving puréed cauliflower which is very nice, so you steam a cauliflower blitz it to within an inch of its life and add a bit of cream so it's pouring consistency, then flavour it up with whatever you fancy, a bit of Parmesan, some herbs, chilli, spices whatever you fancy. You get the added extra of more veg too 🙂