Cook the risoni according to packet instructions, about 8–10 minutes. Drain and set aside to cool.
Place a large frying pan over medium–high heat. Add the olive oil and zucchini pieces and cook for about 3–5 minutes, giving the pan a shake every 30 seconds or using a wooden spoon to stir them. Remove and set aside.
In a large bowl, place the risoni, zucchini, spinach, green peas, currants and chicken.
For the dressing: In a small bowl, whisk together all the ingredients. Season to taste.
Drizzle the dressing over the salad. Toss everything gently to ensure even coating.