Caramelized Onion, Mushroom & Gruyere Tartlets

Name: Caramelized Onion, Mushroom & Gruyere Tartlets
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 tablespoon olive oil; 1 large yellow onion, thinly sliced; 16 ounces white button mushrooms, thinly sliced; 1 clove garlic, chopped; 1/2 teaspoon dried thyme; Salt and pepper, to taste; 1/4 cup white wine; 2 sheets puff pasty (thawed according to direction on package); 1 cup shredded Gruyere Cheese (can substitute any variety of Swiss Cheese); 1 egg + 1 tablespoon water, breaten together; Handful of parsley chopped

Servings: persons

1 tablespoon olive oil
1 large yellow onion, thinly sliced
16 ounces white button mushrooms, thinly sliced
1 clove garlic, chopped
1/2 teaspoon dried thyme
Salt and pepper, to taste
1/4 cup white wine
2 sheets puff pasty (thawed according to direction on package)
1 cup shredded Gruyere Cheese (can substitute any variety of Swiss Cheese)
1 egg + 1 tablespoon water, breaten together
Handful of parsley chopped

1
Preheat oven to 400 degrees F and line two baking sheets with parchment paper
2
Heat the olive oil in a wide, heavy-bottomed pan over medium-low heat and add the onions. Cook, stirring occasionally, until they begin to caramelize, about 20 minutes.
3
Add the butter to the pan. Once melted, add the mushrooms and saute, stirring occasionally, until they are completely soft and all of the liquid evaporates, about 20 minutes.
4
Add the garlic and the thyme and saute until fragrant, about 1 minute. Season with salt and pepper to taste.
5
Add the wine, scraping the bottom of the pan to pull up all of the browned bits, and cook until all of the liquid has evaporated. Remove from heat.
6
Unfold the thawed sheets of puff pastry and cut out circles from the dough, placing them evenly spaced on the baking sheets. Using a very sharp knife, make four small scores around the perimeter of the dough, about 1/4 to 1/2-inch from the edge.
7
Top the rounds of puff pastry with a small spoonful of the onion and mushroom mixture, trying to keep the filling within the score marks. Top with the shredded Gruyere cheese. Brush the edges of the dough rounds with the egg wash.
8
Bake until the pastry is golden brown, about 15 to 25 minutes. Garnish with fresh chopped parsley

219

kcal

Calories

Fat

Carbs

Protein

Fat Carbs Protein

* Per serving · 4 servings · Values may vary.

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Preheat the oven fully and bake on the middle rack for the most even results.
Check for doneness a few minutes early — a toothpick in the center should come out with just a few moist crumbs.
Let it cool before slicing so it sets properly and holds its shape.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Feel free to swap in similar ingredients you already have on hand and adjust seasoning to taste.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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How did you like this recipe?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

You need 11 ingredients. The key ingredients include: 1 tablespoon olive oil, 1 large yellow onion, thinly sliced, 16 ounces white button mushrooms, thinly sliced, 1 clove garlic, chopped, and more.

Yes, Caramelized Onion, Mushroom & Gruyere Tartlets falls under the Baking & Desserts category and is a great choice for this type of meal.

Store in an airtight container at room temperature for up to 3–5 days. For longer storage, freeze for up to 3 months — no need to refrigerate or reheat.

That's it — enjoy your meal!