Preheat oven to 375. Line 2 baking sheets with parchment
In a large bowl, whisk together spices olive oil, smoked paprika, cumin, salt and about half the garlic. Add the squash and red pepper and toss to coat.
Spread the squash evenly on the pan and roast for 35 minutes, stirring at about 25 minutes.
In a smaller bowl, add yogurt, lemon juice and zest and remaining garlic. Season with salt and pepper. Whisk until smooth.
When squash/pepper mixture is slightly browned and tender, remove it from the oven and add it to a serving dish. Toss with walnuts and half the herbs. Drizzle with yogurt dressing and sprinkle with remaining herbs. Enjoy immediately!