Vegan Wild Mushroom Gravy

2 Tbsp Vegan Butter 1 Cup Vegetable Stock/homemade is best  * 1/4 Cup Chopped Onion 8 ozs. Maitake, Chanterelles, Black Trumpets  washed gently and dried in paper towels 1/4 cup Madeira or Sherry 1 Small Onion minced 1 Cup Soy or Rice Milk 3 Tbsp All Purpose Flour 3 Tbsp Nutritional Yeast 1/4 teaspoon Salt and 1 Tbsp Tamari 1/4 teaspoon …