Peel and halve the cucumber, then thinly slice. My yield was 11.3 oz of trimmed weight. Place into a bowl along with the peeled and thinly sliced banana shallot (you can also use a small, sweet onion).
Add the salt and mix well to evenly coat. Leave in the fridge for 30 minutes.
After 30 minutes, transfer the mixture to a sieve or strainer and leave to drain for another 30 minutes. You will be surprised how much excess liquid leeches out.
Pour the cucumber/onion mix into a bowl and stir in the remaining ingredients. Serve immediately.