Place a cucumber horizontally on a chopping board. Use a vegetable peeler to peel it lengthwise into long, thin ribbons.
Place a sheet of rice paper briefly into the water, lay it flat on the chopping board, place a cucumber ribbon across it, then roll it up. Repeat the process for the rest.
Dip one sheet of rice paper in water, then lay it flat on your chopping board. Place one cucumber ribbon across the rice paper and roll it up. Repeat with the remaining cucumber ribbons and rice paper.
Add the minced garlic, chili flakes, spring onion, light soy sauce, sugar, and roasted sesame seeds to a medium-sized bowl.
Heat the oil until hot, then carefully pour it over the mixture. Stir well to combine.
Place the cucumber noodles in a large mixing bowl and pour over the chili oil sauce. Toss gently until every cucumber ribbon is coated in the sauce.
Enjoy your crunchy, spicy, and refreshing cucumber noodles.