Upside Down Potato Onion Tart
Transform simple ingredients into an elegant masterpiece with this Upside Down Potato Onion Tart, a savory treat that combines buttery Yukon gold potatoes, sweet caramelized onions, and golden puff pastry. Infused with fragrant fresh thyme and a touch of tangy balsamic vinegar, this tart delivers layers of bold, earthy flavors. The caramelized onions form a luscious base, while Parmesan cheese adds a salty, nutty finish to the potato layer, baked to perfection under a crisp, flaky pastry shell. Served warm or at room temperature, this visually stunning dish is perfect as a centerpiece appetizer or a satisfying brunch option. Whether you're hosting a dinner party or indulging in comfort food, this tart is sure to impress!
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Recipe Information
Ingredients
- 3 medium Yukon gold potatoes
- 1 Large yellow onion
- 2 tablespoons Unsalted butter
- 1 tablespoon Olive oil
- 1 teaspoon Fresh thyme leaves
- 0.5 teaspoon Salt
- 0.25 teaspoon Black pepper
- 1 teaspoon Balsamic vinegar
- 1 Puff pastry sheet (thawed)
- 1 tablespoon Flour (for dusting)
- 0.25 cup Grated Parmesan cheese
Instructions
Preheat your oven to 400°F (200°C).
Peel the potatoes and slice them thinly into uniform round slices, about 1/8 inch thick. Set aside.
Peel and thinly slice the onion into half-moons.
In a heavy, oven-safe skillet (preferably cast iron, 9-10 inches in diameter), melt the butter and olive oil over medium heat.
Add the sliced onions to the skillet and cook for about 5-7 minutes, stirring occasionally, until they soften and start to caramelize.
Stir in the fresh thyme leaves, salt, pepper, and balsamic vinegar. Remove the skillet from heat and spread the onions evenly across the bottom.
Place the potato slices in overlapping concentric circles over the onions, creating an even layer. Sprinkle Parmesan cheese evenly on top.
On a floured surface, roll out the puff pastry sheet to slightly larger than the skillet size. Carefully lay the pastry over the potatoes and tuck the edges down around the inside of the skillet.
Poke a few holes in the pastry with a fork to allow steam to escape during baking.
Bake the tart in the preheated oven for 25-30 minutes, or until the puff pastry is golden brown and puffed.
Remove the skillet from the oven and let it cool for 5-10 minutes.
Carefully run a knife along the edge to loosen the tart. Place a large plate or serving platter over the skillet and invert the tart onto the plate.
Serve warm or at room temperature. Enjoy your Upside Down Potato Onion Tart!
Nutrition Facts
Calories |
1442 | ||
|---|---|---|---|
% Daily Value* |
|||
| Total Fat | 79.9 g | 102% | |
| Saturated Fat | 37.7 g | 189% | |
| Polyunsaturated Fat | 1.3 g | ||
| Cholesterol | 82 mg | 27% | |
| Sodium | 2023 mg | 88% | |
| Total Carbohydrate | 168.4 g | 61% | |
| Dietary Fiber | 11.1 g | 40% | |
| Total Sugars | 8.4 g | ||
| Protein | 28.2 g | 56% | |
| Vitamin D | 0.0 mcg | 0% | |
| Calcium | 331 mg | 25% | |
| Iron | 7.4 mg | 41% | |
| Potassium | 2627 mg | 56% | |
*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.
