heat a seasoned skillet so a drop of water sizzles and form a ball which slides on the pan
divide the dough ball into eight pieces and shape roll into a ball
place a plastic sheet on the tortilla press and put a dough ball on top. cover with the second plastic sheet and press down lightly with your hand to flatten it a little
pop down the lid of the press and press lightly but firmly using the lever
open the press, peel off the top plastic layer, then rest the tortilla on the palm of your hand, plastic layer uppermost so you can peel it off
put the tortilla straight onto the skillet. Depending on the temperature, turn after 60-90 seconds. The cooked side should show just the odd speckle of very light browning
turn the tortilla with a spatula. If the edges curl sufficiently, you can pick up and edge and turn it with your hands
cook the second side for a similar or slightly shorter time - you want to see the second surface crack slightly with minimal browning
If the hydration and temperature is perfect your tortillas will partially or wholly puff up, a sure sign they're ready to serve
Place the cooked tortillas in a basket line with a tea towel or some kitchen paper
if you're making tortillas in batches you may want to give them a last quick firing on the skillet before serving - no more than 3-4 seconds each side so they stay soft