Preheat oven to 350. Grease loaf pan. Add flax meal to water and set aside. Add apple cider vinegar to 1 cup almond milk set aside. Add yogurt, grapeseed oil, sugar, zest of lemon, lemon juice and vanilla extract and mix on high speed. Add flax mix and milk mix until smooth. Add flour, baking soda and powder, salt and mix till just combined. Add mix to prepared loaf pan and bake for 35 minutes/ until toothpick comes out clean. Cool in pan for 5 and then on cooking rack. Meanwhile mix up powdered sugar, milk and lemon juice and drizzle over cooled loaf.