3 vegetarian mushroom pastry pie Recipes

unsalted butter, heads fennel, finely chopped (about 3 cups), yellow onion, finely chopped, carrots, peeled and finely chopped (about 2/3 cup), white button mushrooms, sliced (about 5 cups), russet potato, peeled and diced small (about 2 1/2 cups), all-purpose flour, low-sodium mushroom broth, whole milk, frozen baby green peas, sliced fresh chives, parsley, white vinegar, egg yolk, store-bought puff pastry or pie dough, defrosted if frozen

unsalted butter (or smart balance), head fennel, finely chopped (about 3 cups, or use 1 head fennel and 1 stalk celery to equal 3 cups), yellow onion, finely chopped, carrots, peeled and finely chopped (about 2/3 cup), white button mushrooms, sliced (about 5 cups), russet potato, peeled and diced small (about 2 1/2 cups), salt & freshly ground black pepper, all-purpose flour (or whole wheat flour), vegetable broth (or mushroom or chicken broth), soymilk (or whole milk), frozen baby green pea, sliced fresh chives (or scallions-green part only), fresh parsley, chopped, apple cider vinegar, red pepper flakes (optional), garlic powder (optional), egg yolk, store-bought puff pastry , defrosted if frozen (or pie dough-double if making a bottom crust)