The roasted potato chips, potato sticks or grated potato products and its production process, comprise treating potato raw materials in a microwave device without deep-fry in the microwave field. The capacity of the microwave device for treating exact quantity of 100 g of potato raw materials present in the microwave field at defined limit values is 800 watts and a treatment time of 8-12 minutes. Before the microwave treatment, the sliced potato raw material has a thickness of 1-3 mm. Thin potato slices are put on each other and are treated in the microwave field. The roasted potato chips, potato sticks or grated potato products and its production process, comprise treating potato raw materials in a microwave device without deep-fry in the microwave field. The capacity of the microwave device for treating exact quantity of 100 g of potato raw materials present in the microwave field at defined limit values is 800 watts and a treatment time of 8-12 minutes. Before the microwave treatment, the sliced potato raw material has a thickness of 1-3 mm. Thin potato slices are put on each other and are treated in the microwave field. The raw potato chips are individually laid out on a smooth and curved or grooved or perforated base, and are one-sidedly or double-sidedly coated with cereal flakes and oil seed or oleaginous fruit such as sunflower kernels, poppy seed, sesame seed, sliced almonds, sliced nuts, chopped pistachio and chopped pines before the microwave treatment. The sliced potatoes present itself between the oil seeds or oleaginous fruit. A drying process of the roasted potato chips takes place in a baking-oven or drying furnace at a residual moisture of 0.1-15% after the microwave treatment. An additive of fat or fat oils is taken in a quantity of 0.1-20% to the potato products before or during the microwave treatment. The roasted potato chips, potato sticks or grated potato products are mixed and coated with cheese, ham or onion before or during the microwave treatment.
