Ultimate Triple Onion Tart

Indulge in the savory elegance of the Ultimate Triple Onion Tart, a show-stopping dish perfect for brunch, lunch, or a sophisticated appetizer. Featuring a medley of caramelized yellow and red onions paired with the delicate freshness of green onions, this tart creates a harmonious blend of sweet and savory flavors. Nestled in a flaky pre-made pie crust and enriched with creamy Gruyère cheese, fresh thyme, and a custard-like filling of eggs and heavy cream, every bite is a luxurious experience. The tart is elevated with a hint of nutmeg for an added layer of warmth, while its golden, bubbling finish guarantees mouthwatering appeal. Ready in just over an hour and ideal for serving warm or at room temperature, this recipe is your ultimate answer for an effortlessly impressive homemade tart.

Nutriscore Rating: 54/100

Prep Time:20 mins

Cook Time:55 mins

Total Time:75 mins

Servings: 8

Ingredients

• 1 package Pre-made pie crust
• 3 medium Yellow onions
• 2 medium Red onions
• 6 stalks Green onions
• 3 tablespoons Unsalted butter
• 1 tablespoon Olive oil
• 1 teaspoon Fresh thyme leaves
• 1 cup Heavy cream
• 3 large Eggs
• 1 cup Gruyère cheese (shredded)
• 1 teaspoon Salt
• 0.5 teaspoon Black pepper
• 0.25 teaspoon Nutmeg (optional)

Directions

Step 1

Preheat your oven to 375°F (190°C). Place the pre-made pie crust into a 9-inch tart pan. Trim any excess pastry and prick the base lightly with a fork. Chill in the refrigerator while preparing the filling.

Step 2

Peel and thinly slice the yellow and red onions. Trim and finely slice the green onions, separating the white and green parts.

Step 3

In a large skillet, heat the butter and olive oil over medium heat. Add the yellow and red onions with a pinch of salt and cook, stirring occasionally, until caramelized and golden brown, about 25-30 minutes.

Step 4

Add the white parts of the green onions and thyme leaves to the skillet. Cook for an additional 3-4 minutes until softened. Remove from heat and allow the mixture to cool slightly.

Step 5

In a mixing bowl, whisk together the heavy cream, eggs, Gruyère cheese, salt, black pepper, and nutmeg (if using) until well combined.

Step 6

Spread the caramelized onion mixture evenly over the chilled pie crust. Pour the cream and egg mixture over the onions, ensuring even coverage. Sprinkle the green parts of the green onions on top.

Step 7

Place the tart on a baking sheet and bake in the preheated oven for 35-40 minutes, or until the filling is set and the top is golden brown.

Step 8

Remove the tart from the oven and let it cool for at least 10 minutes before slicing and serving. Enjoy warm or at room temperature.

Nutrition Facts

Serving size	1433.5 grams (1433.5g)

Amount per serving	% Daily Value*
Calories	3360

Total Fat 251.40g	322%
Saturated Fat 115.10g	576%
Polyunsaturated Fat 1.30g
Cholesterol 1019mg	340%
Sodium 4382mg	191%
Total Carbohydrate 196.00g	71%
Dietary Fiber 16.80g	60%
Total Sugars 34.20g
Protein 72.90g	146%

Vitamin D 130IU	649%
Calcium 1389mg	107%
Iron 10mg	53%
Potassium 1399mg	30%

*The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.

Source of Calories

Fat: 67.8%

Protein: 8.7%

Carbs: 23.5%