Preheat the oven to 400?F. Toss the chickpeas in oil, then put them into a bowl. Combine all the spices in a separate little bowl for your spice blend. Give it a good mix, then sprinkle over the chickpeas, and toss to coat evenly. Put the chickpeas onto a baking sheet and into the oven for about 30 minutes. About halfway through, give them a bit of a shake. At the end of the 30 minutes, taste! If they are still soft, back in they go! You want them to have just a little bit of a soft center. When they cool, they will crisp up more.