Onion Tartlets
Delightfully flaky and irresistibly savory, these Onion Tartlets are a perfect blend of rustic charm and gourmet flavor. Featuring a buttery homemade pastry crust and a rich filling of caramelized onions, Gruyère cheese, and a hint of fresh thyme, this recipe is perfect for appetizers, brunch spreads, or an elegant finger food option. Each tartlet is finished with a silky egg and cream custard, adding a luxurious texture to the already mouthwatering combination. Whether served warm or at room temperature, these golden-brown bites are sure to impress your guests, while the combination of caramelization and creamy Gruyère ensures every bite is packed with flavor. With just 30 minutes of prep time and ingredients such as yellow onions, thyme, and Gruyère taking center stage, these mini tarts are a testament to the beauty of simple, fresh ingredients cooked to perfection.
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Recipe Information
Ingredients
- 90 grams Butter
- 150 grams All-purpose flour
- 0.5 teaspoons Salt
- 3 tablespoons Cold water
- 2 tablespoons Olive oil
- 3 medium Yellow onions
- 1 teaspoons Granulated sugar
- 1 teaspoons Fresh thyme leaves
- 50 grams Gruyere cheese
- 1 large Egg yolk
- 2 tablespoons Heavy cream
Instructions
In a medium mixing bowl, combine all-purpose flour and salt. Add cold butter, cut into small cubes. Use your fingertips or a pastry cutter to rub the butter into the flour until the mixture resembles breadcrumbs.
Add cold water, one tablespoon at a time, mixing gently until the dough comes together. Form the dough into a ball, wrap in plastic wrap, and refrigerate for at least 15 minutes.
While the dough chills, heat olive oil in a large skillet over medium heat. Slice the yellow onions thinly and add them to the skillet.
Cook the onions, stirring frequently, for about 20-25 minutes until soft and golden brown. Add sugar and thyme, cooking for an additional 2 minutes. Remove from heat and let cool.
Preheat the oven to 180°C (350°F). Place tartlet molds or a muffin tin on the countertop.
Roll out the chilled dough on a lightly floured surface to about 3mm thickness. Cut out circles large enough to fit the tartlet molds, pressing the dough gently into the molds.
Grate Gruyere cheese and sprinkle a small amount into each tartlet shell.
Divide the caramelized onion mixture evenly among the prepared tartlet shells.
In a small bowl, whisk the egg yolk with heavy cream. Drizzle a small amount of the egg mixture over the caramelized onions in each tartlet.
Bake the tartlets in the preheated oven for 20-25 minutes, or until the crust is golden and the filling is set.
Remove the tartlets from the oven and let cool slightly before removing them from their molds. Serve warm or at room temperature and enjoy!
Nutrition Facts
Calories |
1979 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 134.3 g | 172% | |
| Saturated Fat | 62.8 g | 314% | |
| Polyunsaturated Fat | 4.9 g | ||
| Cholesterol | 481 mg | 160% | |
| Sodium | 1854 mg | 81% | |
| Total Carbohydrate | 150.8 g | 55% | |
| Dietary Fiber | 9.8 g | 35% | |
| Total Sugars | 19.7 g | ||
| Protein | 37.7 g | 75% | |
| Vitamin D | 0.8 mcg | 4% | |
| Calcium | 647 mg | 50% | |
| Iron | 8.3 mg | 46% | |
| Potassium | 685 mg | 15% | |
*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.
