Open and drain as many cans of chickpeas as you want to do. Pat them dry, tip them in a bowl with just enough olive oil to coat them. Add what ever spices you like the taste of. I used a cajun spice mix and lots of it. Preheat oven to 200 degrees C. Place chickpeas on a baking tray (single layer), sprinkle with more spice. Now cook for about 20-30 minutes until chickpeas are dark brown. Turn the oven off and leave the chickpeas in there while it cools. This will make them really crispy. Eat and enjoy. They will keep for a day or so in a sealed container, but eating them the same day is much more likely to happen.