Creating a Rustic French Onion & Mushroom Tart with Gruyère is like inviting a taste of France directly into your kitchen. This delightful dish combines the rich flavors of caramelized onions, earthy mushrooms, and nutty Gruyère cheese, all enveloped in a flaky puff pastry crust. Whether it’s a cozy weeknight dinner or a show-stopping addition to your next brunch, this tart not only satisfies cravings but also impresses with its rustic charm.

Why you’ll love this dish

If you’re on the hunt for a comforting dish that perfectly balances hearty and elegant, look no further. This Rustic French Onion & Mushroom Tart is quick to prepare and a delightful way to embrace seasonal ingredients. It’s an ideal meal for a casual dinner with friends, a special occasion, or even a cozy night in. Plus, it’s budget-friendly since it doesn’t require fancy ingredients—just simple, fresh produce that delivers on flavor.

"This tart is a game changer! The flavors meld together so beautifully, and it looks as amazing as it tastes. My family couldn’t get enough!"

Preparing Rustic French Onion & Mushroom Tart with Gruyère

Making this tart is straightforward, which is part of its appeal. You’ll start by preparing the puff pastry, then move on to caramelizing the onions and sautéing the mushrooms. The ultimate assembly involves layering these savory fillings onto the pastry, sprinkling with Gruyère, and baking until golden and bubbly. It’s a simple process that yields impressive results, perfect for both beginner cooks and seasoned chefs.

What you’ll need

Gather the following ingredients to create your tart:

• 1 sheet puff pastry, thawed
• 1 egg (for egg wash)
• 1 tbsp olive oil
• 1 tbsp butter
• 1 large yellow onion, thinly sliced
• 1 1/2 cups cremini or baby bella mushrooms, sliced
• 1 tsp fresh thyme leaves
• Salt & pepper to taste
• 3/4 cup grated Gruyère cheese
• 2 tbsp heavy cream (optional for creaminess)
  (You can substitute regular cream with a plant-based version if you’re aiming for a dairy-free option.)