Select CUSTOM setting and dial up 7 on the browning control dial

Preheat until orange light flashes up and the word HEATING disappears

Grate potatoes, place into a clean tea towel and squeeze to remove most of the moisture

Combine eggs, sour cream and horseradish in a large mixing bowl. Toss through grated potatoes to coat and season well with salt

Spread approximately 1 cup of the potato mixture into each waffle square. Close lid and cook for 15 minutes or until potatoes are cooked and crispy. To give the rostis a golden colour, brush tops of potato rosti with melted butter halfway through cooking time

Meanwhile toss the tomatoes, avocado, red onion, garlic, chilli and coriander. Combine with lime juice, oil and season to taste with salt and pepper

Serve hot rosti topped with tomato salsa, baby spinach and parmesan