This is MY much adapted version of Jamie Oliver's Turkey and Sweet Leek Pie! I made this with left over Christmas turkey this year, and it was so delicious and went down a bomb with my family and friends! A new Jamie Oliver recipe that he showed on his Family Christmas show this year and one that is so clever, as this pie makes its own gravy! I have left out adding the chestnuts and sage to the pastry as he suggests, I will try it sometime in the future though, as it sounds a brilliant idea; I have added this option at the end of the recipe however, for those who want to try it that way. Serve this with mashed potatoes and the extra gravy in a gravy boat on the side. Here is what Jamie says about this pie: "This is dead simple, completely versatile and absolutely gorgeous. It’s not a pretty-boy pie; it’s a proper, old-school pie that everyone will be over the moon to see on the table. I’m putting leftover white turkey meat to good use here, but you could also mix brown meat in there too." I agree, all of my family and friends were over the moon to see this on the post Christmas table, I bet it tastes great with chicken and ham too. NB: he original recipe makes enough for 6 to 8 people, mine is perfect for 4 very hungry people!