Cumin and Sriracha add heat and depth to this super-simple party hors d'oeuvre.
Preheat oven to 425 degrees. On a rimmed baking sheet, toss carrots and onion with 2 tablespoons oil and the cumin. Season with salt. Roast until golden brown and tender, about 35 minutes, flipping halfway through.
Transfer vegetables to a food processor, and pulse until a coarse paste forms. Add remaining 1/4 cup oil, the vinegar, Sriracha, and garlic. Pulse to combine. Season with salt. Dollop with yogurt and serve with pita bread.