Mix the flaxseed and water and let rest a few minutes
For the crust: in a bowl mix all the dry ingredients first, then add the flaxseed gel and the margarine / vegan butter, start mixing with a spoon and as soon as big crumbles start to form, start kneading with your hand until you get a compact, firm dough. Shape it into a ball, cover it in plastic wrap and let it rest for at least 30 minutes in the fridge
In the meantime, slice the pumpkin, the portobello mushrooms and the red onion into thin pieces and sautee them a few minutes in a cooking pan with olive oil, salt & pepper to taste and a sprinkle of ground rosemary
Pre-heat the oven at 350 F / 180° C
Take the crust dough out of the fridge, keep ¼ of the dough for the decoration, put the rest in a non sticking / greased baking pan and spread it by pushing it with your hands and with the help of the bottom of a mug/glass, until it is all even at the bottom and has half an inch border.
Fill the crust with the plant-based creamy "cheese" or with my cashew creamy sauce (you can find the link to the recipe up in the post) and cover it with the sauteed veggies.
Use the remaining pie dough to decorate as you like :) and then bake for 25-30 minutes
Let it cool down a bit before slicing it :)