A golden-brown tart appears beautifully baked with caramelized onions peeking through the melting Gruyere cheese, dusted with flecks of fresh thyme leaves. The tart is carefully cut into quarters, and the flaky layers of the tart crust are revealed in one of the slices that's lifted slightly.

Savory French Onion Tart

Name: Savory French Onion Tart
Prep time: 20 min
Cook time: 45 min
Total time: 65 min
Yield: 4 servings
Cuisine: French
Ingredients: 3 Onions thinly sliced; 1.5 cups Gruyere Cheese grated; 1 tablespoon Fresh Thyme chopped; 2 Eggs beaten; 1/2 cup Heavy Cream; 1 sheet Puff Pastry defrosted; 2 tablespoons Unsalted Butter; to taste Salt and Pepper

A comforting tart with caramelized onions and Gruyere.

Category Brunch

Prep 20 minutes

Cook 45 minutes

Style French

Technique Baking

Diet Friendly Vegetarian

Daily recipe · November 25, 2023

A little about this dish

Forget about the classic French Onion Soup! We're taking its comforting taste and warmth and reinventing it into a savory French Onion Tart, perfect for brunch. The caramelized onions bring out a rich flavor, enhanced by the thyme and Gruyere cheese.

Ingredients (for 4)

Onions — 3 — thinly sliced
Gruyere cheese — 1.5 cups — grated
Fresh thyme — 1 tablespoon — chopped
Eggs — 2 — beaten
Heavy cream — 1/2 cup
Puff pastry — 1 sheet — defrosted
Unsalted butter — 2 tablespoons
Salt and pepper — to taste

Preparation

Step 1 — 🌡️🍞🔪

Preheat your oven to 400°F (200°C). Take 1 sheet of defrosted puff pastry, roll it out into a tart pan and prick the bottom with a fork. Bake for 15 minutes until lightly golden.
Step 2 — 🍳🧅🔥

As the pastry bakes, heat 2 tablespoons of unsalted butter in a pan over medium heat. Add in 3 thinly sliced onions and cook until caramelized, roughly 20 minutes. Season with salt, pepper, and 1/2 tablespoon of chopped thyme.
Step 3 — 🥚🥛🧀

In a bowl, combine 2 beaten eggs, 1/2 cup of heavy cream, and 3/4 cup of grated Gruyere cheese. Add a pinch of salt and pepper to taste.
Step 4 — 🧅🥧🥄

Spread the caramelized onions evenly over your pre-baked tart shell. Pour the prepared egg mixture over the onions.
Step 5 — 🧀🌿🔥

Sprinkle the remaining Gruyere and 1/2 tablespoon of thyme on top. Bake the tart for 25-30 minutes, until it turns golden and the cheese gets bubbly.
Step 6 — ⏱️🔪😋

Allow the tart to rest for a few minutes before slicing. Enjoy it while it's still warm!

A final fox tip

This French Onion Tart can be customized with different types of cheese like Emmental or Comté. Add some crumbled bacon on top for a non-vegetarian take! Kids can help with rolling out the puff pastry and mixing the egg mixture. Bon Appétit!