Ultimate Onion Tart Recipe

Introduction

The ultimate onion tart is a deliciously rich and savory dish perfect for a light lunch or elegant appetizer. With a buttery shortcrust base and a creamy, caramelized onion filling, it’s sure to impress both family and guests.

Ingredients

• 300g shortcrust pastry, thawed if frozen
• 25g butter
• 2 tbsp olive oil
• 900g onions, halved and thinly sliced
• 2 medium eggs
• 300ml double cream
• 40g vegetarian parmesan-style cheese, grated

Instructions

1. Step 1: Heat the oven to 190°C (fan 170°C, gas mark 5). Roll out the pastry on a lightly floured surface and use it to line a deep 23cm fluted flan tin. Line the pastry with baking paper and fill with baking beans. Bake blind for 15 minutes.
2. Step 2: While the pastry bakes, heat the butter and olive oil in a large frying pan. Add the sliced onions, cover, and gently fry for about 30 minutes until fully softened but still pale in color.
3. Step 3: In a bowl, beat the eggs and double cream together. Stir in the grated cheese and season to taste. Add the cooked onions and mix well.
4. Step 4: Remove the baking beans and paper from the partially baked pastry case. Spoon the onion mixture into the case and bake for 25-30 minutes until the filling is lightly set and the top is browned.
5. Step 5: Allow the tart to cool slightly before slicing and serving.

Tips & Variations

• Use red onions for a sweeter flavor or add a pinch of thyme for an herbal note.
• For a non-vegetarian version, sprinkle crispy bacon or pancetta over the onions before adding the cream mixture.
• If you prefer a crisper base, blind bake the pastry for 20 minutes instead of 15.

Storage

Store leftover tart covered in the refrigerator for up to 2 days. Reheat gently in a low oven to keep the crust crisp, or enjoy cold as a snack.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I make the tart ahead of time?

Yes, you can prepare the tart in advance and refrigerate it before baking. Add extra baking time if baking directly from the fridge.

What can I substitute for vegetarian parmesan-style cheese?

You can use regular parmesan, pecorino, or a firm grating cheese of your choice depending on your taste and dietary preferences.

Ultimate Onion Tart Recipe

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★★★★★

4.6 from 142 reviews

• Author: Jack
• Total Time: 1 hour 25 minutes
• Yield: 8 servings 1x
• Diet: Vegetarian

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Description

This Ultimate Onion Tart is a savory and creamy delight featuring caramelized onions in a crisp shortcrust pastry base, combined with a rich custard of eggs, double cream, and vegetarian parmesan-style cheese. Perfect as a comforting lunch, dinner, or elegant appetizer.

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Ingredients

Scale 1x2x3x

Pastry

• 300g shortcrust pastry, thawed if frozen

Filling

• 25g butter
• 2 tbsp olive oil
• 900g onions, halved and thinly sliced
• 2 medium eggs
• 300ml double cream
• 40g vegetarian parmesan-style cheese, grated
• Salt and freshly ground black pepper, to taste

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Instructions

1. Preheat and prepare pastry: Heat your oven to 190°C (fan 170°C/gas mark 5). Roll out the shortcrust pastry on a lightly floured surface and line a deep 23cm fluted flan tin with it. Line the pastry with baking paper and fill with baking beans for blind baking.
2. Bake the blind pastry: Bake the pastry case in the preheated oven for 15 minutes to set the base without the filling.
3. Cook the onions: While the pastry bakes, heat butter and olive oil in a large frying pan over medium heat. Add the sliced onions, cover, and gently fry for about 30 minutes, stirring occasionally, until the onions are completely softened but still pale, avoiding browning.
4. Prepare the custard mixture: In a bowl, beat together the eggs and double cream until combined. Stir in the grated vegetarian parmesan-style cheese along with salt and freshly ground black pepper to taste.
5. Combine and fill: Stir the softened onions into the custard mixture, then spoon this filling evenly into the pre-baked pastry case.
6. Bake the tart: Return the tart to the oven and bake for 25-30 minutes until the filling is lightly set and the top is golden brown.
7. Cool and serve: Allow the tart to cool slightly before slicing and serving warm or at room temperature.

Notes

• Use vegetarian parmesan-style cheese to keep the tart vegetarian-friendly.
• To prevent the onions from browning, fry them covered and stir occasionally for even cooking.
• Blind baking the pastry prevents a soggy base once the filling is added.
• This tart can be enjoyed warm or cold and pairs well with a simple green salad.
• If you prefer a crisper bottom, increase blind baking time by a few minutes but watch closely to avoid overbaking.
• Double cream can be substituted with single cream for a lighter version, though the filling may be less rich.

• Prep Time: 20 minutes
• Cook Time: 1 hour 5 minutes
• Category: Savory Tart
• Method: Baking
• Cuisine: British

Keywords: onion tart, savory tart, vegetarian tart, shortcrust pastry, caramelized onions, vegetarian parmesan cheese, British recipe