Rinse and slice the cucumber into 1/8 inch rounds and add to the bowl. Add Half the green onions.
1 Cucumber
Mix in the Gochugaru (chili powder) and taste for more.
1/2 tsp Gochugaru (Korean Red Chili Powder), Plus More to Taste
You can either serve the cucumbers right away, or give them at least 15 minutes in the refrigerator to chill and absorb the flavors. I like to give mine 30.
Serve them in the sauce, topped with the sesame seeds and sliced green onions.
1/4 tsp Sesame Seeds
Notes
My go-to substitute for Gochugaru is red chili flakes with a heavy pinch of smoked paprika. You can also try three parts paprika to one part cayenne.