Preheat the oven to 200°C, 400°F, gas 6. Meanwhile, remove and discard
the seeds from the chillies, squeeze the juice from the limes, peel the
avocados, remove the stone and chop them and roughly chop the fresh
coriander.
To make the guacamole, mash or blend the chillies, lime juice, avocado
and coriander until creamy but a bit chunky. Season with sea salt and
freshly ground black pepper, and pour into a serving dish. Brush the
tortillas with the oil, season, and then sprinkle with the thyme
leaves. Lay them on a baking tray – don't overlap them too much – and
bake for 5 minutes until golden brown, then leave them to cool. Break
into wedges if you like, and serve the crispy tortillas with the
guacamole.