Mediterranean Tacos with Spicy Roasted Cauliflower

Preheat oven to 450°F. Line a 15x10-inch baking pan with foil. In a large bowl stir together the first five ingredients (through garlic powder). Add cauliflower and potatoes; toss to coat. Spread cauliflower mixture in prepared pan. Roast 20 to 25 minutes or until cauliflower and potatoes are tender and charred, stirring once. 2. In a bowl stir together tahini, lemon juice, and enough water to reach drizzling consistency. Spread hummus on pitas. Add cauliflower mixture and cabbage. Top with tahini sauce, cilantro, jalapeño, and scallions. Serve with lemon wedges.