Heat the oven to 400°F.
In a small bowl, mix together dill, dried oregano, dried thyme, garlic powder, onion powder, turmeric, and ½ teaspoon of salt.
In a medium bowl, toss together cauliflower florets and 2 tablespoons of olive oil. Coat with the spice mixture until evenly covered.
Using a clean dish towel, pat the drained and rinsed garbanzo beans dry. Remove any skins that come off while drying, but otherwise don't worry about them.
In a second medium bowl, toss together garbanzo beans and 1 ½ tablespoons of olive oil. Coat with ½ teaspoon of salt and ¼ teaspoon of pepper until evenly covered.
Spray two metal baking sheets with nonstick cooking spray. Layer the cauliflower on one baking sheet, and the garbanzo beans on the other. Roast for 27-30 minutes, stirring halfway through.
About 5 minutes before the veggies are done, warm the naan in a toaster.
To serve, spread a thin layer of hummus on the naan. Top with roasted veggies and a sprinkle of feta cheese.