Set a pot of water to boil for the pasta and preheat the oven to 400 degrees F.
Place zucchini on a wire rack and drizzle with olive oil, salt and pepper on both sides. Roast for 15 minutes, or until slightly browned and softened.
While the pasta and zucchini are cooking, combine the olives, capers, arugula, chili flakes, lemon zest, scallions, walnuts, feta cheese, and herbs in a large bowl. Add in cooked pasta and zucchini when ready.
To make the dressing, combine miso, lemon juice, olive oil, honey, pepper, and shallot in a jar and shake it to emulsify. Taste and make adjustments as needed.
Add half of the dressing to the pasta salad and toss to combine, adding more dressing as needed. Taste and adjust seasoning.
Enjoy!