Step 1

Slice cucumber ¼–½ inch thick.

Step 2

In a medium bowl, whisk together vinegar, water, sugar, salt, pepper, crushed red pepper flakes and dill.

Step 3

Add thinly sliced cucumber and onion to bowl, and mix until liquid coats all the cucumber and onion.

Step 4

Place salad into container and allow to chill several hours or overnight.