To make the rosti, cook the whole potatoes in a saucepan of salted boiling water for 10 minutes. They should still be a little firm. Drain and let cool, then grate the potatoes and place in a bowl.
Add the egg, chopped onion and parsley and season with salt and pepper. Stir to combine, then form patties (you can use a biscuit cutter to shape).
Spray the airfryer basket with oil, place the patties in the basket and cook for 20 minutes at 180°C (350°F), turning halfway through the cooking time.
To make the meatballs, combine all the ingredients in a bowl. Form six balls and place in the airfryer basket.
Cook for 10 minutes at 180°C (350°F), turning halfway through the cooking time.
Serve the meatballs and rosti with the pasta sauce, heated if desired, and rice if using.
