Recipe roughly from - http://www.seriouseats.com/recipes/2012/10/bangers-and-mash-with-onion-gravy-recipe.html Didn’t have regular milk for the potatoes. Used leftover buttermilk from last week’s fried chicken plus a splash of soy milk. Creamy mash with a mild tang from the buttermilk. And that. Onion. Gravy.