
A golden-brown, crispy vegetable pancake packed with the natural sweetness of parsnips and carrots balanced by savory leeks. This simple one-pan dish makes for a satisfying vegetarian lunch or a hearty seasonal side.
In a large mixing bowl, combine the thinly sliced leek, grated carrots, grated parsnips, and finely chopped garlic. Pour in the lightly beaten egg and toss until the vegetables are evenly coated.
In a separate small bowl, whisk together the plain flour, onion salt, and a generous grinding of black pepper. Sprinkle this mixture over the vegetables and stir thoroughly until the flour is fully incorporated and forms a light binding batter.
Melt the unsalted butter in a large non-stick frying pan over medium heat. Spoon the vegetable mixture into the pan, spreading it out and pressing down firmly with a spatula to create an even layer that covers the base.
Cook for 5–6 minutes until the underside is golden and the rosti slides easily when the pan is shaken. Carefully invert the rosti onto a large flat plate, then slide it back into the pan. Cook the other side for another 5–6 minutes until crispy and golden all over.
Transfer the rosti to a board or serving plate. Scatter the sliced spring onions and fresh thyme leaves over the top, then slice into wedges and serve immediately.
For the crispiest results, use a clean kitchen towel to squeeze out as much moisture as possible from the grated carrots and parsnips before mixing. If you don't have onion salt, you can substitute it with regular sea salt and half a teaspoon of onion powder.




