Upside Down Onion Tarts
Introduction
Upside Down Onion Tarts are a delightful savory pastry that combines caramelized onions with a flaky, buttery crust. Perfect for appetizers, brunch, or a light dinner, these tarts have a rich, slightly sweet flavor from the onions, balanced with the savory notes of cheese and herbs. They are impressive to serve, yet surprisingly easy to make.
Ingredients
For the Caramelized Onion Base:
- 3 large onions, thinly sliced
- 2 tablespoons olive oil
- 1 tablespoon butter
- 1 teaspoon sugar
- Salt and pepper to taste
For the Tart Pastry:
- 1 sheet of puff pastry (store-bought or homemade)
- 1/2 cup grated cheese (Gruyère, cheddar, or your choice)
- 1 teaspoon fresh thyme (optional)
- 1 egg, beaten (for egg wash)
Instructions
- Preheat the Oven: Preheat your oven to 200°C (400°F).
- Caramelize the Onions: Heat olive oil and butter in a pan over medium heat. Add sliced onions, sugar, salt, and pepper. Cook slowly, stirring occasionally, until onions are soft and golden brown (about 20–25 minutes).
- Prepare the Tart Pan: Grease a tart pan or individual tart molds with butter or oil. Spread the caramelized onions evenly on the bottom. Sprinkle cheese and thyme on top of the onions.
- Add the Pastry: Roll out the puff pastry to fit over the tart pan. Place it over the onions, tucking the edges inside. Brush the pastry with beaten egg for a golden finish.
- Bake the Tart: Bake for 25–30 minutes, or until the pastry is puffed and golden brown.
- Cool and Invert: Allow the tart to cool for 5–10 minutes. Place a plate over the tart and carefully invert it so the onions are on top.
Description
This tart is a perfect balance of sweet and savory. The caramelized onions create a luscious, melt-in-your-mouth layer atop the crisp, golden puff pastry. The addition of cheese adds richness, while fresh thyme brings a subtle herbal aroma. Each bite offers a delicious combination of textures and flavors that make it a crowd-pleaser.
Tips
- Use sweet onions like Vidalia or Walla Walla for a naturally sweeter caramelization.
- Don’t rush the onion caramelization; low and slow is key for maximum flavor.
- You can make mini tarts for individual servings — just adjust baking time slightly.
- Serve warm with a simple green salad for a complete appetizer or light meal.
Correction/Notes
- Ensure puff pastry is fully thawed if using frozen.
- Avoid overcooking the onions until they burn; they should be golden brown and soft.
Enjoy!
Slice your Upside Down Onion Tart and watch your guests’ eyes light up! Perfect with a glass of white wine or a simple sparkling water, this tart makes any meal feel special.
