Preheat oven to 200°C. Mix together the cumin, coriander, paprika and chilli in a large bowl. Add the frozen Sadia French Fries and toss well to coat evenly.
Spread the spice coated potato wedges on a large baking tray, season well with salt. Place in the oven and cook for 25-30 minutes, until golden, turning occasionally.
Transfer to a serving bowl and serve accompanied with the sour cream.