Vegetable oil Salt In a small bowl, stir together the mayonnaise and yogurt. Stir in spices and salt. Cover and refrigerate at least 1 hour or overnight. Makes 1 cup. Immediately before serving, scrub potatoes and cut lengthwise into quarter to 1 cm slices. Cut slices into french fry shapes. Place on baking sheets and drizzle with oil, tossing to coat. Spread in a single layer and season lightly with salt. Bake at 200ºC or 20 to 25 minutes or until cooked through. Serve with curry dip.