Just in case the pictures don't suffice.
1. Pre-heat oven to 180 Celsius.
2. Buy a pkt of Roti* - 6 to a pkt. And yes I know that they are not technically tortillas but they're pretty much the same thing and they're the best that I've used thus far (I've tried at least two other brands and types of tortillas)
3. Put your Roti on a large plate. Rub each Roti with oil - front and back. Stack the Roti and cut into 8ths.
4. Arrange Roti chips on a tray (no need for greasing the tray as they're already oiled!). Try not to let them overlap - you will no doubt have to do at least two (depending on the size of your tray) or more tray-fuls.
5. Bake for 6 mins - no turning, nothing. If they are not quite golden try for a minute or so longer till they reach a desired colour - but be careful because they can burn very quickly and very easily!
6. Remove your chips from the tray and load it up with another batch for baking - repeat as necessary till all your chips are baked.
You can add seasonings as you wish but we always just prefer to have them plain. And THAT is pretty much my fav most convenient snack food - yum, arguably healthy, not to mention super quick and dead easy to make.
Also great to make up on short notice say if you have a pkt or two lying around in your freezer for unexpected guests/occasions - handy!
*Just thought I should add that I am in NZ and thus necessarily have used NZ brands or at least brands and items that are available in NZ to make these chips - if you're outside of NZ you may or may not be able to get the same things - I would suggest experimenting with tortillas from a few different brands to see what works for you - in my opinion smaller (roti) tortillas are the best to use - and you still get heaps of chips! I tried using large Old El Paso ones but they stuck together and were flakey. I also tried using large Wholemeal Tortillas - these needed to be baked for longer and just didn't taste as nice. OR if you make your own - even better! That's what I need to learn to do :D