Ingredients
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12 ounces cremini mushrooms, such as Baby Bella®
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1/2 red onion, sliced vertically
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1 tablespoon olive oil
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1 tablespoon unsalted butter
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2 tablespoons low-sodium soy sauce
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1 teaspoon dried thyme
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2 garlic cloves, minced
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salt and freshly ground black pepper to taste
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1/2 (17.3 ounce) package frozen puff pastry, thawed
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1 1/2 cups shredded Gruyere cheese
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1 large egg, beaten
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1 teaspoon dried thyme, or as needed for garnish (optional)
Directions
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Preheat the oven to 400 degrees F (200 degrees C). Line a baking sheet with parchment paper.
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Cut mushrooms into 1/4-inch-thick slices (don’t cut too thinly).
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Heat olive oil and butter in a large skillet over medium heat. Add mushrooms and onion and cook, stirring occasionally, until mushrooms are golden and onions are soft and translucent, 6 to 8 minutes.
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Stir in soy sauce, thyme, and garlic and cook until fragrant, 30 to 60 seconds. Season with salt and pepper; set aside.
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Unfold puff pastry sheet onto a lightly-floured work surface. Gently pat down or roll out dough with a rolling pin into a 10x10-inch square. Using a sharp knife, score a line about 1/2 inch from all edges to create a border, being careful not to cut all the way through. Use a fork to generously prick pastry sheet all over inside the border.
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Transfer puff pastry to the baking sheet, and brush the borders with beaten egg. Evenly spread Gruyere cheese inside the border, and top with mushroom mixture.
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Bake until tart is puffed and lightly browned, 10 to 12 minutes. Garnish with additional thyme, and serve warm.
Cook's Note:
If you’re unable to use Gruyere, Swiss cheese is a decent substitute, but won’t quite be as tasty as the Gruyere.
Nutrition Facts (per serving)
| 414 | Calories |
| 30g | Fat |
| 23g | Carbs |
| 15g | Protein |
| Nutrition Facts | |
|---|---|
| Servings Per Recipe 6 | |
| Calories 414 | |
| % Daily Value * | |
| Total Fat 30g | 38% |
| Saturated Fat 9g | 47% |
| Cholesterol 67mg | 22% |
| Sodium 545mg | 24% |
| Total Carbohydrate 23g | 8% |
| Dietary Fiber 1g | 4% |
| Total Sugars 2g | |
| Protein 15g | 29% |
| Vitamin C 1mg | 1% |
| Calcium 314mg | 24% |
| Iron 2mg | 10% |
| Potassium 351mg | 7% |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.
(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.
