In a small bowl, combine the rice vinegar, sugar, sesame oil, crushed red pepper, and salt. Set the dressing aside.
Peel and slice the cucumber using your favorite method (see photos below for my technique). Place the sliced cucumbers in a large bowl.
Chop the peanuts into smaller pieces. Slice the green onions.
Add the peanuts, green onions, and dressing to the sliced cucumbers. Stir to combine. Serve immediately or refrigerate until ready to eat. Give the salad a brief stir before serving to redistribute the dressing and flavors.
*Don't substitute the rice vinegar!Rice vinegar is fairly inexpensive, can be found in the Asian section of most major grocery stores, and will stay good in your pantry for just about forever. If you make Budget Bytes recipes on the regular, I promise it will get used again! Store leftovers in an airtight container in the fridge for up to 2-3 days. The cucumber will soften over time. Cut the cucumber into larger chunks if you want it to stay crisper for longer.