Lightly whisk the eggs in a bowl with a couple of pinches of salt.
Cut the avocado flesh into thin slices, the tomatoes and spring onions into small pieces.
Grate some cheese and cut the chorizo into small pieces (if liked).
Heat a small amount of oil in a non-stick frying pan, then pour in the egg mixture, letting it spared out.
Whet the surface is almost set, lay the avocado pieces on one half, then scatter the tomato, spring onion, cheese and/or chorizo bits on top. Add some chopped or sliced chilli, if you like the heat.
When the egg has set, add the chopped parsley or coriander leaves, then turn the empty part over the filled half. Cook for another minute, then slide it to a plate and cut it in half.
Serve warm.