Boil 1.5L water in a saucepan.
Meanwhile, sprinkle garlic powder, ginger and salt over both sides of chicken.
In a bowl, whisk peanut butter, soy sauce, vinegar and honey.
Heat olive oil in a pan over medium-high heat.
Add the chicken and cook, flipping once, until almost cooked (around 6 minutes).
Add broccoli to saucepan. Cook, covered, until bright green, just tender, and the chicken is cooked (about 5 minutes more).
Add noodles to boiling water and cook until tender (about 3 minutes).
Reseve 160ml noodle cooking water, drain and coat noodles in peanut sauce, adding cooking water to loosen.
Slice chicken and add to the noodles and broccoli.
Top with peanuts and coriander, and season.