Deconstructed French Onion Soup Tartlet

This tartlet recipe is essentially French onion soup on puff pastry, topped with Parmesan and mozzarella cheese.

• Preparation Time: 10 mins
• Cooking Time: 30 mins
• Total Time: 40 mins
• Calories: 590 Calories

Ingredients

• 2 tablespoons butter
• 2 tablespoons olive oil
• 1 cup shredded mozzarella cheese
• 1 clove garlic, minced
• ½ cup grated Parmesan cheese
• ¼ teaspoon ground black pepper
• 1 teaspoon dried thyme
• ¼ cup white wine
• ½ cup beef broth
• 1 large white onion, sliced
• ½ teaspoon kosher salt (such as Diamond Crystal®)
• 1 sheet puff pastry

Recipe Instructions

Step 1

Preheat oven to 400 degrees F (200 degrees C).

Step 2

Heat olive oil and butter together in a skillet over medium-high heat until the butter is melted, 2 to 3 minutes. Saute onion and garlic in the hot oil mixture until the onion begins to caramelize, 15 to 20 minutes.

Step 3

Pour white wine over the onion mixture; bring to a simmer and cook until fragrant, about 2 minutes. Add beef broth and thyme; cook until the liquid reduces in volume by half. Season the mixture with kosher salt and black pepper.

Step 4

Trim puff pastry and fit into a tart pan. Score a rim along the edge of the pastry. Puncture the center of the pastry with a fork. Spread the onion mixture over the pastry; top with Parmesan cheese and mozzarella cheese.

Step 5

Bake in preheated oven until the crust is golden brown, 15 to 20 minutes.