Celebration Celeriac and Sweet Garlic Pie

|Anna Joness: Its everything I want in a pie: a cheddar and winter-herb flaky pastry; a creamy filling sweet with balsamic garlic and roasted celeriac; and a crisp grated celeriac roof.||250g spelt flour125g unsalted butter0.5 teaspoon sea salt1 teaspoon rosemary1 teaspoon thyme1 teaspoon sagelemon zest from one lemon25g cheddar1 egg yolk70 mg water3 cloves garlic separated and peeledolive oil1 tablespoon balsamic vinegar1 tablespoon honey1kg celeriac220g cheddar150g creme fraiche1 tablespoon lemon juice1 tablespoon wholegrain mustardWorcestershire sauce2 eggs|Put the flour into a mixing bowl. Add the butter and salt. Rub gently with your fingertips until the mixture is like fine breadcrumbs. Stir through the herbs lemon zest and cheddar.Beat the egg yolk with 1 tablespoon of cold water. Add to the flour and mix until it forms a dough. Add more water a teaspoon at a time until it comes together into a smooth dough. Wrap in cling film and chill in the fridge while you make the filling.For the filling put the cloves of garlic into a saucepan cover with cold water and bring to a gentle simmer. Cook for 23 minutes then drain.Wipe the saucepan dry. Add the garlic and 1 tablespoon of olive oil and fry on a high heat for 2 minutes. Add the balsamic vinegar and 100ml water bring to the boil and simmer gently for 10 minutes.Add the honey most of the rosemary and thyme (reserving the rest with the sage) and a good pinch of salt. Continue to cook on a medium heat for a further 5 minutes or until most of the liquid has evaporated and the garlic cloves are coated in a dark syrup.Meanwhile peel the celeriac and cut it into quarters. Set aside 300g and slice the rest into 2cm-thick pieces. Put them into a saucepan cover with hot water and boil for 710 minutes until they are soft and have turned slightly translucent.Drain and tip into a big mixing bowl. Add the cheese creme fraiche lemon juice mustard parsley a splash of Worcestershire sauce and eggs. Add a good pinch of salt and grind of pepper and gently fold in the garlic cloves.Preheat the oven to 180C/gas mark 4. Sprinkle flour on a work surface and roll out the pastry to 34mm thick. Line a 20cm-diameter cake tin with the pastry ensuring a little spills over the edges.Pour the filling into the pastry case. Coarsely grate the reserved celeriac and pile it on top. Finish with the reserved rosemary and thyme all the sage and a drizzle of olive oil. Bake for 45 minutes or until the tart filling has set and the top is golden brown.Remove from the oven leave to cool a little then take it out of the tin. Lay a few herbs on top and serve warm.|30.00 minutes|10|https://www.theguardian.com/lifeandstyle/2017/dec/06/ofm-20-best-christmas-recip...