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Mini Salmon Quiches Recipe

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4.8 from 69 reviews

A delicious and savory Onion Tart featuring a buttery shortcrust pastry filled with caramelized onions and a rich, creamy cheese custard. Perfect as a snack, appetizer, or light meal, this tart combines the sweetness of slow-cooked onions with the savory depth of Gruyère or Parmesan cheese in a crisp, tender crust.

Ingredients

For the Crust (Shortcrust Pastry):

  • 200 g all-purpose flour
  • 100 g cold unsalted butter, cubed
  • 1 egg
  • Pinch of salt
  • 1-2 tbsp cold water

For the Filling:

  • 3-4 large onions (about 500 g), thinly sliced into half-rings
  • 30 g unsalted butter
  • 100 ml heavy cream (20-30% fat)
  • 2 eggs
  • 100 g hard cheese (Gruyère, Parmesan, or Cheddar), grated
  • Salt and pepper, to taste
  • A pinch of nutmeg (optional)

Instructions

  1. Prepare the Dough: In a large bowl, combine the flour, salt, and cold cubed butter. Rub the butter into the flour with your fingers until the mixture resembles fine breadcrumbs. Add the egg and 1 to 2 tablespoons of cold water, then knead gently until a smooth dough forms. Shape the dough into a ball, wrap it tightly in cling film, and refrigerate for 30 minutes.
  2. Caramelize the Onions: While the dough chills, melt the butter in a pan over medium heat. Add the sliced onions and cook gently, stirring frequently, for about 20 minutes until they become soft and golden brown with a rich caramelized flavor. Be careful not to burn them.
  3. Make the Filling Mixture: In a bowl, whisk together the eggs and heavy cream. Add the grated cheese, salt, pepper, and a pinch of nutmeg if using. Mix until well combined.
  4. Roll Out the Dough: Remove the dough from the fridge and roll it out on a lightly floured surface into a circle large enough to fit your tart pan (about 23 cm in diameter). Line the tart pan with the dough, pressing it gently into the edges, and prick the base with a fork to prevent bubbling during baking.
  5. Assemble and Bake: Spread the caramelized onions evenly over the tart base. Pour the egg and cheese mixture on top. Bake in a preheated oven at 180°C (350°F) for 25-30 minutes until the filling is set and golden brown on top.
  6. Cool and Serve: Allow the tart to cool slightly before slicing. This tart is delicious served warm or at room temperature.

Notes

  • You can use different hard cheeses such as Gruyère, Parmesan, or Cheddar based on your flavor preference.
  • Caramelizing onions slowly ensures maximum sweetness and depth of flavor; don’t rush this step.
  • To make the crust flakier, keep the butter as cold as possible and handle the dough gently.
  • The tart can be served warm, cold, or at room temperature, making it versatile for any occasion.