Mushroom and Gruyere Tart Recipe

Ingredients with Measurements:
- 2 tablespoons olive oil
- 1/2 onion, diced
- 2 cloves garlic, minced
- 8 ounces mushrooms, sliced
- 1/4 teaspoon salt
- 1/4 teaspoon freshly ground black pepper
- 1 sheet frozen puff pastry, thawed
- 1/2 cup Gruyere cheese, grated
- 1/4 cup Parmesan cheese, grated
- 2 tablespoons fresh parsley, chopped

Special Equipment Needed:
- 9-inch tart pan
- Baking sheet
- Rolling pin

Step-by-Step Instructions:
1. Preheat oven to 375°F.
2. Heat olive oil in a large skillet over medium heat. Add onion and garlic and cook until softened, about 5 minutes.
3. Add mushrooms, salt, and pepper and cook until mushrooms are softened, about 5 minutes.
4. Unfold puff pastry onto a lightly floured surface and roll out to a 12-inch circle. Place pastry into a 9-inch tart pan and press into the sides.
5. Spread mushroom mixture over the bottom of the pastry. Sprinkle Gruyere and Parmesan over the top.
6. Place tart pan on a baking sheet and bake in preheated oven for 25 minutes, or until pastry is golden brown.
7. Sprinkle with fresh parsley and serve.

Time:
Preparation Time: 15 minutes
Cooking Time: 25 minutes
Temperature: 375°F
Serving Size: 8

Nutritional Information (per serving):
Calories: 220
Fat: 13g
Carbohydrates: 16g
Protein: 8g

Substitutions for Ingredients:
- Olive oil can be substituted with butter or vegetable oil.
- Onion can be substituted with shallots.
- Gruyere cheese can be substituted with Swiss or cheddar cheese.
- Parmesan cheese can be substituted with Romano or Asiago cheese.

Variations:
- Add cooked bacon or sausage to the mushroom mixture.
- Substitute mushrooms with other vegetables such as zucchini, bell peppers, or spinach.
- Add herbs such as thyme, oregano, or rosemary to the mushroom mixture.

Tips and Tricks:
- For a crispier crust, brush the pastry with an egg wash before baking.
- For a richer flavor, add a tablespoon of white wine to the mushroom mixture.

Storage Instructions:
Store leftovers in an airtight container in the refrigerator for up to 3 days.

Reheating Instructions:
Reheat leftovers in the oven at 350°F for 10 minutes, or until heated through.

Presentation Ideas:
Serve the tart with a side salad or roasted vegetables.

Garnishes:
Garnish with freshly chopped parsley or chives.

Pairings:
Pair with a light white wine such as a Sauvignon Blanc or Pinot Grigio.

Suggested Side Dishes:
Roasted potatoes, steamed vegetables, or a side salad.

Troubleshooting Advice:
- If the pastry is not browning, increase the oven temperature to 400°F.
- If the pastry is browning too quickly, cover with foil and continue baking.

Food Safety Advice:
Refrigerate leftovers within 2 hours of cooking.

Food History:
Tarts have been around since the Middle Ages and were originally made with a savory filling.

Flavor Profiles:
This tart has a savory flavor with a hint of garlic and onion.

Serving Suggestions:
Serve as an appetizer or as a light main course.

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Region: French

Taste: Savory, Rich, Earthy, Cheesy, Nutty