Steam the sweet potatoes for ± 20 minutes.
Let them cool a little and crush the flesh.
Add the finely chopped onion, along with all the fresh and dry herbs, also the mustard, the breadcrumbs, and the cheese, season with salt and pepper, mix everything firmly together.
Roll the puff pastry open.
Place the strip of puff pastry in width for you.
Brush a strap of 1 cm about lights with Dorure, spread the potato filling as moderately as possible, stay away from the smeared piece of dough, roll from below carefully up.
The seam allows you at the bottom of the rolled role.
Let it set for minus 1 hour in a fridge, spread very lightly with Dorure and roll the puff pastry sausage through the mixture of poppy seeds and parmesan.
Cut into 1.5 cm pieces, place them flat on a baking sheet with baking paper and let it bake for 15-20 minutes at 175-180 °.
Serve warm.
You can also make this in advance, store it in a refrigerator and heat up in the oven at 180 ° for 4 minutes.
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