Ive got 10 people coming for Xmas dinner and am trying to make life as easy as possible, mainly because my kitchen is so tiny. Im doing roast potatoes but would like to have mashed as well and wondered whether anyone had tried the ready made versions from the supermarket. Do they taste OK? Has anyone got any recommendations for the nicest tasting - have Sainsburys/Asda/Waitrose/Tesco all nearby.