French Onion Mushroom Tart: A Savory Delight

Indulge in the rich, savory flavors of a French Onion Mushroom Tart, a delightful dish that combines the sweetness of caramelized onions with the earthiness of mushrooms, all nestled in a flaky, buttery crust. This elegant tart makes for an impressive appetizer, light lunch, or a stunning centerpiece for any gathering. With its deliciously layered flavors and beautiful presentation, this recipe is sure to be a crowd-pleaser.

What Is a French Onion Mushroom Tart?

A French Onion Mushroom Tart is a delectable pastry that features a filling made from caramelized onions, sautéed mushrooms, and creamy cheese, all baked within a tender tart shell. Inspired by classic French onion soup, this dish captures the essence of its flavors while adding a gourmet twist with the addition of mushrooms. It’s perfect for showcasing seasonal produce and can be served warm or at room temperature.

Ingredients

To prepare a French Onion Mushroom Tart, you will need the following ingredients:

For the Tart Crust:

• 1 1/2 cups all-purpose flour
• 1/2 cup unsalted butter (cold, cubed)
• 1/4 teaspoon salt
• 4–6 tablespoons ice water

For the Filling:

• 2 tablespoons olive oil
• 1 large onion (thinly sliced)
• 8 ounces mushrooms (sliced; button, cremini, or a mix)
• 2 cloves garlic (minced)
• 1 teaspoon fresh thyme (or 1/2 teaspoon dried thyme)
• Salt and pepper to taste
• 1 cup heavy cream
• 3 large eggs
• 1 cup Gruyère cheese (shredded)
• 1/2 cup Parmesan cheese (grated)

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