Process avocado, cucumber, lime juice and mint in a blender.
Season to taste.
Pancakes: Beat egg and milk together.
Pour into the flour and mix well.
Add corn and coriander.
Leave to rest for 15 minutes.
Heat a little oil in a medium non-stick frying pan.
Pour in a little batter and lift the pan, rolling the mixture to cover the base.
Cook over a medium heat for 2 minutes or until golden brown underneath.
Flip over and cook other side.
Serve warm with the avo and cucumber.