Peel and halve the cucumber and scrape out the seeds with a spoon. Cut the cucumber and chilli pepper into slices. Mix the sweet chili sauce with the sesame oil in a bowl. Add the cucumber and chilli and mix everything together. Garnish with the sesame seeds.
Tip: When I take the salad with me to work, I put the cucumber and chilli together in a box and take the sauce and sesame seeds with me separately. Just before dinner, I mix everything together.