French Onion Tart: A Savory Delight with Caramelized Onions and Cheese

Serving: This tart is best served warm, right out of the oven. It makes a great appetizer or side dish for any meal.
Storage: Leftovers can be stored in an airtight container in the refrigerator for up to 2 days. Reheat in the oven to restore the puffiness of the pastry.
Variations
Add Meat: For an extra savory twist, you can add cooked bacon or prosciutto on top of the onions before baking.
Different Cheese: Swap the Gruyère or Swiss cheese for other types, such as cheddar or fontina, for a different flavor profile.
Vegetarian Option: This recipe is naturally vegetarian, but feel free to add other vegetables, like mushrooms or spinach, for variety.
FAQ
Can I use other types of onions?
Yes, while Vidalia onions are sweet and perfect for caramelizing, you can use yellow onions or red onions as well. Keep in mind that the flavor will be slightly different depending on the onion variety.

Can I make this tart ahead of time?
Yes, you can prepare the tart up to the point of baking and store it in the fridge. When ready to bake, brush with the egg wash and bake as directed.

Conclusion
This French Onion Tart is a savory, crispy, and cheesy treat that will elevate any meal. Whether served for a special occasion or as a cozy dinner, it’s sure to impress with its deliciously caramelized onions and flaky puff pastry. Enjoy!