Preheat the oven to 180 degrees Celsius / 355 Fahrenheit top and bottom heat
Make the mushroom filling
Heat the butter in a large frying pan. Fry the mushrooms, shallot and garlic together with the thyme and bay leaf for about 5 minutes.
Add the walnuts, balsamic vinegar and salt and pepper to taste and mix together, keep frying until the balsamic has evaporated. Then let it cool completely.
Make the vegan wellington
Roll out the puff pastry on a sheet of baking paper on a baking tray. Spread the mushroom filling over the dough, leaving 5 cm of space from each corner. Lay the beets pressed side by side width wise.
Roll the dough tightly. If you want, cut little stars out of the extra puff pastry using an embroiderer. Press these against the roll.
Beat the egg with a splash of water and brush the dough with the egg wash*. Bake the beet wellington for 40 minutes until cooked and golden brown.
Make the mushroom sauce
Add the butter to a frying pan and fry the mushrooms for about 5 minutes.
Add the balsamic vinegar, stock cube and cream. Simmer for 10 minutes.
Blend with a immersion blender to make a smooth sauce.
Serve the beet wellington with the mushroom sauce and a side dish of your choice. Enjoy!
Good to know:
*For a vegan option, you can use apricot jam, plant-based milk or cornstarch slurry.