Method
- 01
Cook the onion in olive oil until soft. Add mushrooms and cook until their liquid evaporates and the mixture begins to brown.
- 02
Add garlic and thyme. Fold in lentils, walnuts, soy sauce, and mustard. Cool completely.
- 03
Overlap the pastry sheets on parchment and roll just enough to seal the seam.
- 04
Shape the filling into a compact loaf, wrap it in pastry, seal the edges underneath, and cut a few small steam vents.
- 05
Brush with egg wash and bake at 400°F until deeply golden and crisp, about 40 to 45 minutes.
- 06
Rest 12 minutes before slicing with a serrated knife.