Preheat the oven to 210 degrees C/ 190 degrees C fan / 425 degrees F / Gas Mark 7
Drain the chickpeas and rinse thoroughly.
Transfer to a clean tea towel and pat dry - this will help them crisp up in the oven.
In a bowl combine the chickpeas with the salt, oil and maple syrup making sure they are evenly coated.
Spread the chickpeas out on a baking tray, and roast in the oven for about 18-20 mins, until crisp and golden.
Remove from the oven and mix with the garam masala, cayenne pepper and rosemary until even coated.
Leave to cool before serving.