Preheat the oven to 400 F. Prepare the chicken breasts by placing them into an ovenproof dish, coating them with the cooking oil and then sprinkling on the garlic powder and salt and pepper, to taste.
Roast the chicken breasts for 20 to 25 minutes until they are just cooked through. Remove them from the oven and set to one side to cool.
Bring a large saucepan of salted water to the boil. Add the fusilli pasta and cook it according to the packet instructions, then drain and allow to cool.
Mix together the toasted sesame oil, the soy sauce, the maple syrup, the ginger paste, and the orange juice to form the pasta salad sauce.
Slice or shred the chicken, and then place it into a large mixing bowl along with the pasta, mandarin segments, red pepper, lettuce, avocado, scallions, sesame seeds, and cilantro. Add the mixed pasta salad sauce and carefully toss everything together to coat, before serving.