1. Place cabbage and scallions in a bowl. Bring peanut butter, 1/2 cup oil, sugar, vinegar and soy sauce to a boil in a small pan over medium-high heat, stirring. Simmer until thickened, about 1 minute. Cool slightly.
2. Warm a large skillet over medium heat. Taking one topping at a time, toast sesame seeds, almonds and ramen until lightly browned, stirring, about 3 minutes each. Remove to a bowl.
3. Increase heat to medium-high; add 2 Tbsp. oil. Season chicken with salt and pepper. Sauté, turning once, until cooked, about 8 minutes. Remove and slice. Add noodle mixture and oranges to bowl with cabbage. Toss in dressing. Top with chicken; serve.