Best French Onion Tart With Cheesy Thyme Pastry Recipes

FRENCH ONION TART

Steps:

• Preheat the oven to 400 degrees F. Line a baking sheet with parchment paper.
• On a work surface, roll the puff pastry into a roughly 10 by 16-inch rectangle. With a sharp knife, trim uneven edges to make a perfect rectangle. Evenly cut off the outer 1 inch of each side of the rectangle in strips; put the puff sheet on the baking sheet. Dip your finger in water and run around the top edges of the rectangle and replace the removed strips of pastry along the edges of the sheet, pressing lightly to adhere. With a fork, pierce the interior of the tart shell to prevent rising; do not pierce the adhered edges. Bake until the outer edges have puffed and are golden in color; about 15 minutes. Set aside.
• Heat 2 tablespoons olive oil in a large skillet over medium-low heat. Add onions and thyme sprigs and season well with salt and pepper, to taste. Cook, stirring occasionally, until the onions begin to brown. Add the stock, a tablespoon at a time, as the pan gets dry, scraping and stirring the brown bits that are stuck to the bottom oft the pan. When the onions are caramelized to a dark golden color, remove from the heat and discard the leafless thyme sprigs (the leaves fall off while cooking).
• When ready to serve, preheat the oven to 350 degrees F. Evenly spread the caramelized onions on the cooked pastry shell and heat in the oven until warmed through, 5 to 7 minutes. Remove from oven, to a cutting board and cut into wedges. Arrange on a serving platter and garnish each wedge with a sprig of fresh thyme. Serve immediately and enjoy!

FRENCH ONION TART WITH CHEESY THYME PASTRY

Steps:

• Put the flour in the bowl of a food processor with the 100g butter. Blitz until the mixture resembles fine breadcrumbs, then add 50g of the cheese, 1 tbsp of the thyme leaves, some freshly ground black pepper and 1 tsp salt. Blitz again briefly to combine. Add 2-3 tbsp cold water, and pulse again until it comes together into a dough. If you don't have a food processor, do this in a bowl - rub the flour into the butter first, then stir in the remaining ingredients with a knife. Wrap and chill for at least 40 mins.
• Meanwhile, heat the 25g butter and the olive oil in a large frying pan over a low-medium heat, and cook the onions with a pinch of salt for 40-50 mins, stirring often, until sticky, golden and very soft when pressed with the back of a spoon. If they start to catch, reduce the heat further and add a splash of water. Be patient, as they will take a while to caramelise, but keep your eye on the pan so they don't burn.
• Stir in the vinegar, sugar and the anchovies. Keep stirring until the vinegar has evaporated, and the anchovies have dissolved into the onions. Remove from the heat.
• Heat the oven to 190C/170C fan/gas 5 and roll the pastry out onto a lightly floured work surface to a 3mm thickness. Use the pastry to line a 23cm tart tin (use the rolling pin to help you do this). Trim the edges so they're just overhanging the sides. Patch the pastry with the offcuts, if needed. Scrunch up a sheet of baking parchment, then open it out again to line the pastry, and fill with baking beans. Bake for 15 mins, remove the parchment and beans, then bake for a further 5-8 mins, or until the pastry looks dry, without any raw spots.
• Meanwhile, whisk the eggs, cream, remaining thyme and the rest of the cheese together with a pinch each of salt and black pepper. Stir in the caramelised onions. Trim the sides of the pastry using a serrated knife to neaten the edges. Pour the filling into the pastry case and tap the tin gently on the work surface to release any bubbles.
• Bake the quiche for 25-30 mins on the middle shelf of the oven until lightly golden and set in the middle, with a slight wobble. Leave to cool in the tin for at least 15-20 mins, then slice. To make the salad, whisk the olive oil and vinegar together in a bowl, then toss in the remaining ingredients. Pile the salad on top of the quiche, or serve alongside. If you like, leave the quiche to cool completely, then chill before serving. Will keep in the fridge for up to three days.

ONION AND THYME TART

Steps:

• For the pastry, sift the flour into a mixing bowl and add a pinch of salt. Add the butter and rub together with your fingertips until the mixture resembles breadcrumbs and all the butter is combined.
• Add one to two tablespoons of water and mix to bring the mixture together as a dough. If it seems too dry add another tablespoon of water. Form into a ball and flatten into a disc, wrap in clingfilm and leave it to rest in the fridge for half an hour.
• Preheat the oven to 180C/350F/Gas 4.
• For the filling, heat a large heavy-based frying pan or saucepan over a medium heat. Add the butter and, once melted, stir in the onions along with a pinch of salt. Reduce the heat to medium low and cook the onions for 20-30 minutes, or until golden-brown and completely softened. Stir them often and make sure that none burn or stick to the bottom of the pan. Stir in the thyme.
• Remove the pastry from the fridge and roll out until the thickness of a £1 coin. Grease a 20cm/8in or 23cm/9in tart tin with butter and line the tin with the pastry, pressing it into the edges. Place in the preheated oven and bake for 10 minutes. Remove, brush the base and inside edges with a little of the beaten egg, place back in the oven for five minutes and then remove.
• Mix the remaining beaten egg with the cream and cooked onions. Season with a pinch of salt and pepper. Spoon the onion mixture into the pastry case and spread evenly.
• Place back into the preheated oven and cook for 30-35 minutes, or until the filling is set but with a slight wobble when poked. Remove from the oven and leave to cool for 10 minutes before slicing into wedges and serving. This is also delicious cold.

FRENCH ONION AND BLUE CHEESE TART

Steps:

• Start by cooking the onions. They need to be cooked slowly on low heat, so it's best to begin with those.
• Melt the butter in a large nonstick frying pan-we have a load of onions to cook. When the butter has melted, pick off the thyme leaves and add, then add the garlic and onions. Mix everything together.
• Now add the pepper, salt, and sugar and mix. Cook on medium heat for 30 minutes, stirring occasionally, until you have onions that look like the kind you would only eat with a burger in a Sunday market at 6 a.m.!
• While that cooks, start on the pastry. Preheat the oven to 400°F. Line a baking sheet with some parchment paper or use the paper the pastry comes in and roll out the pastry onto the sheet.
• Using a knife, score a smaller rectangle ½ inch/1cm inside the pastry rectangle, making sure not to cut all the way through. Pierce the inner rectangle with a fork all over to allow the steam to escape when it bakes.
• Brush the edges with the egg and bake for 20 minutes, until golden all over.
• Take out and, using the back of a spoon, push down all the puffed-up pastry of the inner rectangle, creating a nice neat border.
• Take the blue cheese and crumble all over the inner rectangle of the pastry. Add the onions and scatter them all over till you have an even layer. Now bake for 15 minutes.
• Take out and let cool for 10 minutes before eating, sprinkled with the chives.