Avocado and Cucumber guacamole

I have a great Mexican recipe book by Roberto Santibanez who has some wonderful salsa and guacamole recipes.  This one is my own version where I've mixed his basic guacamole recipe with his cucumber and pineapple guacamole recipe.  So here's my own invention, the avocado and cucumber guacamole.  It's beautifully fresh and green and the cucumber gives it added crunchy texture that goes well.

Ingredients
1 small red onion
4 tablespoons coriander leaves and stalks
1 small cucumber
3 Haas avocados
1 lime
1 teaspoon salt

Method
You can do this all by hand if you don't have a food processor, but processing it makes it so much quicker.  Peel and quarter the red onion, and wash the coriander.  Add them to a food processor and blend until smooth.  Now peel and deseed the cucumber, cut it into large chunks and add it to the onion and coriander and pulse until you have small pieces.  Now peel the avocados and remove the stones and add it to the mixture.  Drizzle the lime juice ove the avocados to stop them going brown and then pulse the food processor until you have medium sized pieces.  Add salt to taste and serve with Mexican food.