Hi, I have just cooked a humungous about of roast potatoes,they are almost fully roasted, a little under the time I would usually cook them for . My intention was to freeze them and then cook in oven again on Christmas day from frozen. I thought this was the correct way to do it, but now I've googled it, it looks like you're supposed to roast them after par boiling !! Can't find anywhere really that says roast, freeze, roast again. Anyone done this before ? Do I need more oil when I re-roast ? Cover with foil for a bit then remove to crisp up again ? Or not ? Thanks in advance .