Place vermicelli in a heat-proof bowl. Cover noodles with boiling water and let soak for 1 to 2 minutes or until softened. Drain well and rinse under cold water. Set noodles aside.
In a wok, heat the oil over medium-high heat. Add the onion, pepper, and garlic. Cook, stirring, for 2 minutes or until the pepper is tender but still slightly crunchy.
Add cooked vermicelli, green onions, curry, turmeric, and sugar. Mix well to combine everything.