1/2 medium or 200g sweet potato, sliced 1.5mm thick
2 tablespoons olive oil
1 garlic clove, peeled and crushed
2 tablespoons butter
1 red onion, peeled and sliced
100 grams feta, crumbled
1 egg yolk
Fresh thyme, to serve
1Preheat oven to 200 deg celsius and line a baking tray with baking paper.
2Mix the olive oil and garlic in a bowl and place the sweet potato slices in the mixture so they are coated.
3Place the butter in a frying pan, add the sliced onion and sauté for about 10 minutes until soft and caramelised. Remove from heat and set aside to cool.
4Trim the edges of the pastry so it resembles a rough oval shape and place onto the prepared baking tray. Using half the feta, arrange a layer of the cheese on the pastry leaving a 4cm border, followed by the caramelised onion. Now arrange a layer of the sweet potato slices over the top, working in a circle with slices overlapping, until all the slices are used.
5Now fold the border of the pastry inwards, brush with egg yolk, and top the sweet potato with remaining feta.
6Bake in the oven for 15-20min or until golden brown. Top the galette with fresh herbs like thyme and sage, drizzle with olive oil and season with salt and pepper.