Cook the pasta according to the package instructions so that it's al dente. Drain.
Toss the drained pasta in a large bowl. Pour the olive oil on the pasta and let the it cool to room temperature.
Add the mangoes, red pepper, zucchini, red onion, and peanuts.
Pour about half the dressing into the bowl and toss until the ingredients are well combined and evenly coated with the dressing.
Taste and add more dressing as needed to suit your taste. Add the arugula and toss gently to combine. Serve and enjoy immediately.