Spinach Feta and Mushroom Pie Dairy

Name: Spinach, Feta, and Mushroom Pie (Dairy)
Ingredients: For the Crust:; 1 1/2 cups white whole wheat flour (or all-purpose flour); 1/4 teaspoon salt; 1/4 teaspoon baking powder; 1/2 cup extra virgin olive oil; 2 tablespoons milk; For the Filling:; 1 tablespoon extra virgin olive oil; 3 cloves garlic (peeled, smashed, and chopped); 10 ounces crimini mushrooms (cleaned, trimmed, and finely chopped); 10 ounces frozen spinach (chopped); 3 large eggs; 3/4 cup milk; Pinch of nutmeg; 1/4 cup all-purpose flour; 8 ounces feta cheese (preferably sheep's' milk, crumbled)