Toss your sliced cucumber and sliced onion together in a large mixing bowl. Add all of the other ingredients except the green onion to the mixing bowl and toss again to combine, ensuring that the veggies are evenly coated in the liquid and spices.
Top the salad with the diced green onion. Serve and enjoy!
Notes
You can store this salad in an airtight container in the fridge for up to 6 days. Make sure to give the salad a quick toss before serving any leftovers because the liquid will settle at the bottom of your container.
Other things you can add to this salad include minced onion, sesame seeds, and a drizzle of sriracha sauce.
It is not necessary to peel your cucumber, but you are more than welcome to if you would like.
If you want to add a little bit of sweetness to your salad, you can use a yellow onion instead of a white one.