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Caramelized Onion Gruyere Tart

Caramelized Onion Gruyere Tart: A Cozy Gourmet Delight

This Caramelized Onion Gruyere Tart combines rich flavors and elegant presentation, making it a must-try for any gathering.
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Prep Time 1 hour
Cook Time 50 minutes
Cooling Time 15 minutes
Total Time 2 hours 5 minutes
Servings: 8 slices
Course: Dinner
Cuisine: French
Calories: 280
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Pastry Crust
  • 1 package Pastry Dough Store-bought or homemade
For the Filling
  • 3 cups Sliced Onions Yellow or sweet onions
  • 1 cup Gruyere Cheese Grated, Swiss cheese works as substitute
  • 4 slices Bacon Optional
  • 3 large Eggs Fresh eggs
  • 1 cup Heavy Cream Half-and-half is an alternative
  • 1 tablespoon Thyme Fresh or dried
Extra Seasoning
  • 1 teaspoon Salt
  • 1 teaspoon Pepper

Equipment

  • 9-inch tart pan
  • skillet
  • Mixing bowl

Method
 

Step-by-Step Instructions for Caramelized Onion Gruyere Tart
  1. Preheat your oven to 375°F (190°C).
  2. Cook chopped bacon in a skillet until crispy, about 5-7 minutes. Set aside, reserving grease.
  3. Sauté thinly sliced onions in the reserved grease over medium heat for about 10 minutes.
  4. Reduce heat to low and caramelize onions for an additional 40 minutes, stirring frequently.
  5. Roll out pastry dough and fit into a 9-inch tart pan, prick the bottom with a fork and pre-bake for 15 minutes. Remove pie weights and bake for an additional 5 minutes.
  6. Layer the base of the crust with grated Gruyere cheese, followed by caramelized onions.
  7. In a bowl, whisk together eggs, heavy cream, and thyme. Pour this custard over the onions and cheese.
  8. If using bacon, sprinkle it over the tart along with any extra Gruyere cheese.
  9. Bake the tart in the oven for 25-30 minutes until filling is set and top is golden.
  10. Allow the tart to cool for 10-15 minutes before slicing and serving.

Nutrition

Serving: 1sliceCalories: 280kcalCarbohydrates: 20gProtein: 8gFat: 20gSaturated Fat: 10gPolyunsaturated Fat: 1gMonounsaturated Fat: 5gCholesterol: 110mgSodium: 400mgPotassium: 200mgFiber: 1gSugar: 3gVitamin A: 150IUVitamin C: 5mgCalcium: 200mgIron: 1.5mg

Notes

Store leftovers in an airtight container in the fridge for up to 3 days. Reheat in oven at 350°F (175°C) for about 10 minutes to restore crispness.

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