Place sliced cucumbers into a fine-mesh strainer suspended inside a medium sized bowl. Season with salt. Toss thoroughly to combine.
Place in the refrigerator for a least 30 minutes or up to overnight to drain the cucumbers of excess moisture.
Remove cucumbers from fridge and transfer to a clean kitchen towel. Pat dry.
Add the cucumbers and red onions to a bowl. Add half of the dressing and toss to coat.
Place salad in refrigerator and allow flavors to develop for 30-60 minutes, stirring occasionally.
Taste and add more of the dressing as desired. Garnish with sesame seeds, peanuts and avocado.