Brush and bake: Brush the dough with the beaten egg. Bake for about 30 minutes, or until the dough is golden and crispy.
Serve: Remove from the oven and serve hot or cold.
Tips:

Cheese: For a more intense flavor, add grated Gruyère cheese over the onions before baking.
Variations: Try adding other caramelized vegetables, such as apple or pear.
Side dishes: The rustic caramelized onion tart is perfect to accompany salads or grilled meats.
Why this recipe is special:

Easy to make: With just a few ingredients and simple steps, you can prepare this delicious treat at home.
Versatile: It can be served as a starter, side dish or main course.
Tasty: The combination of caramelized onion and crispy dough is simply irresistible.
With this recipe, you can enjoy a classic French cuisine in the comfort of your own home