Place the green beans in a large mixing bowl and Scattered the French beans evenly on the baking sheet. Drizzle generously with some cooking oil and give it a toss to make sure they are nicely coated
Line your baking sheet with aluminum foil or silicon mat (it's up to you). Scattered the green beans as evenly as possible on the baking sheet (take care not to over crowd). Pop into the oven and roast them for the next 20 minutes or until they are soft and lightly browned
Drizzle the sesame oil mixture on the roasted beans and then sprinkle with sesame seeds and mix to make sure the beans are nicely coated. Transfer to serving platter and serve immediately as a side dish