Preheat the oven to 400 F˚
In a saucepan add the oil and sauté the carrots and celery until tender.
Add in the lentils, vegetable broth, spices, nutritional yeast, tamari sauce, sage, thyme, and pepper.
Bring to a boil then reduce to a simmer for 40 minutes, or until the lentils are tender add more broth if needed.
When the lentil is cook and the liquid is all absorb remove from heat and add the breadcrumb and reserve
Let the lentil mixture cool until you can addle it with your hands.
Place parchment paper on baking sheet, then place your puff pastry spread on top, place the lentil stuffing, and make a loaf.
Fold the dough on both side of the loaf, then pinch, seal and tuck the edges.
Brush your wellington with the non-dairy milk and crop the top with a knife for the steam to escape
Bake for 45 minutes, or until golden brown and crispy.
Let cool for about 10 minutes, then cut in slices.
Serve hot with vegan gravy if desired.