Due to my DM having a chest infection I have just offered to host Christmas so that she can have a more restful day. She has ordered beef so that's the meat we will be having. On the day I want to be able to be with the family as much as possible so what can I buy tomorrow and pre-prepare so that I'm not in the kitchen all day? There are 7 adults and I child. I was already providing starters so it's just the actual roast I need to sort. Also I'm not great with roast potatoes, how do I get these fluffy and crispy? Thanks in advance