Slice skinned carrots into matchstick sizes, place into a bowl. Slice round cucumbers without skinning them, and cut the outside of each round into 4 sticks, throwing away the middle part (seeds), place into the bowl.

Quartered onion (if you shallots, they are perfect, if not, onion will do). Add in as many green chilies as you like.

Pour water salt sugar and vinegar, stir to combine. Adjust flavor, let stand in the fridge for at least 2 h or overnight.