Place potato, spring onion and dry contents of the sachet of KNORR Cheese & Bacon Flavour Potato Bake in a bowl and mix together well.
Heat 15 ml oil in a non-stick frying pan.
Cook heaped tablespoons of the potato mixture in batches over medium heat for 3 min on each side until golden brown.
Remove and place onto absorbent paper.
Repeat with the remaining mixture using the rest of the oil.
Toss together the tomato, pine nuts, basil and balsamic vinegar.
Place a rosti onto each plate and top with a handful of spinach, a slice of ham/prosciutto and a spoonful of the tomato mixture.
Top with a second rosti.
Great for a brunch snack!