This is easier than you think to make and is so delicious, make double and pop one in the freezer
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Cook from frozen
Cover with foil and cook at 180C/160C fan/gas 4 for 1 hr 15 mins (at this stage it should be defrosted). Then remove foil, increase oven to 200C/180C fan/gas 6 and cook for 30 mins more until piping hot. If you froze single portions, check 15 mins before the end of each stage – they may cook quicker.