Spiralize the cucumber to make coodles
Drain cucumber in collandar and discard the seeds. Dry on paper towels for about ten minutes. By the time you're done with the rest of the steps, the coodles should be dry.
Heat skillet over medium heat. Don't add oil or other ingredients until skillet is hot--about five minutes. While you wait for the pan to heat, mix the sauce.
Place all sauce ingredients except the corn starch and the last tablespoon of liquid in a small bowl and mix together. You'll add the corn starch tablespoon of liquid later. If you are using sesame oil, you'll need to use a hand-infuser to thoroughly mix the oil and the other ingredients.
Add olive oil to skillet--it should shimmer if the skillet is hot
Add onions and stir until softened--three or four minutes
Add minced garlic to pan. Heat until fragrant--about a minute.
Add ground chicken to pan. Stir occassionally until cooked, about five minutes
MIx together 1 TBSP water or chicken broth and 1TBSP corn starch, then add to the sauce and stir. Add the sauce to the skillet with the meat and onions and stir until the sauce thickens and coats the meat--a couple of minutes.
Separate the coodles into two piles and place each on a dinner plate. Top top with chicken and sauce, then sprinkle with sesame seeds and green onion tips.