Add salt to your chopped cucumbers. Mix well and set aside in the fridge for 15 minutes.
While you are waiting for you cucumbers, start making the dressing by combining apple cider vinegar, sweet chili sauce, and water. Simmer on medium until the dressing thickens. Set dressing aside and let cool.
Drain the cucumbers of any excess water and add the dressing. Toss the red onion, cucumber, and sunflower seeds (or sesame seeds, if you aren’t Chef K!). Serve immediately.