instant mash on toast what it says on the tin! By Guest Contributor December 2, 2008 Quick Preparation Time Cook Time Servings0IngredientsASDA smartprice mash (7p) – 1 packet = 2 servingsASDA smartprice bread (30p)Instructions Step 1: boil some water and pour a little onto the instant mash, add butter, salt and milk if you have it. Mix it all up until nice and creamy. Toast some bread. put the mash on the toast and enjoy!