GF Harissa Spice Availability: In stock £1.69 Qty - + Add to Cart Wishlist Email to a Friend Share Description: Greenfields Harissa Spice - An authentic tasting version of this popular North African spice blend. Can be used in powder form but normally you mix it with a little warm water and olive oil until it reaches a smooth paste like consistancy. Harissa spice is ideal for making North African-inspired dishes.