Traditionally an apple-based dessert, the basics of a tarte tatin work equally well with beetroot, or any leftover root veggies, as a savoury main course!
Based on 4 servings, adjust as needed.
Preheat your oven to 210°C/190°C Fan. Slice each beetroot in half and then into wedges. Combine beetroot, garlic, balsamic vinegar, two-thirds of the thyme, drizzle of olive oil, pinch of salt and grind of black pepper in a bowl and mix.
Roll out the pastry on a floured work surface until 3mm thick and cut into a disc the same size as the top of a large, 20-25cm, ovenproof skillet. Now lightly grease the pan, then scatter with cubes of butter and the beetroot. Tarte Tatin is an upside down tart so try to arrange everything nicely in the skillet as whatever pattern is on the bottom, will be facing upwards when you serve the tart!
Place the pastry disc over the beetroot-butter mix and tuck it in around the edges. Prick a couple of times with a knife. Place in the middle shelf of your oven to bake for 20-25 minutes, until the pastry is golden, crisp and puffed up.
Meanwhile, mix together the celery, apple, parsley, lemon juice with a splash of olive oil to create your side salad. Season to taste.
Once cooked, remove the tart from your oven and carefully give it sharp firm shake to loosen its base. Use a knife to carefully loosen around the rim, then place a large upturned plate over the top of the pastry and turn the skillet over so the tart falls onto the plate.
Top your beetroot tarte tatin with the feta and tarragon (and a drizzle of honey if you like things sweet!). Serve immediately in slices with your salad on the side.