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onion mushroom tart

(1 RATING)
85 Pinches 12 Photos
Irit_Birman avatar
The Villages, FL
Updated on Oct 28, 2023

Easy to make yet very delicious.

Blue Ribbon Recipe

Need a vegetarian appetizer option for a holiday party? This onion mushroom tart is a sophisticated appetizer that's not hard to make. The onions have a wonderful caramelized flavor. Baby Bella mushrooms add a layer of heartiness to the tart. Sauteing the onions and mushrooms with a splash of wine brings another layer of sweetness and a slight tang. Gruyere cheese adds another earthy flavor to the tart. Store-bought puff pastry is the base for this savory tart and is super flaky once baked. Cut into squares for a lovely party appetizer.

— The Test Kitchen
prep time 30 Min
cook time 30 Min
method Bake
yield 8-10 serving(s)

Ingredients

  • 3 tablespoons olive oil, extra virgin
  • 2 large onions, cut in half and sliced thin
  • 1 pound baby bella mushrooms, sliced
  • 1 teaspoon salt
  • 1/4 teaspoon pepper
  • 1/4 cup white wine
  • 1 package puff pastry sheet, thawed
  • 1 large egg + 1 Tbsp water beaten (egg wash)
  • 1 cup grated Gruyère cheese

How To Make onion mushroom tart

  • Saute onions in oil.
    Step 1
    Heat olive oil in a large saute pan. Add onions stirring continuously until they start to soften.
  • Add mushrooms, salt, and pepper. Add wine.
    Step 2
    Add mushrooms, salt, and pepper. Stir until mushrooms release their liquid. Add wine and cook until almost all evaporate. Remove from heat and set aside.
  • Pressing puff pastry sheets together on a lined baking sheet.
    Step 3
    Preheat oven to 350 F. Line a baking sheet with parchment paper. Unfold defrosted pastry sheets. Lay them side by side (along the long side) and press to seal.
  • Scoring the edges of the puff pastry.
    Step 4
    With a sharp knife score a 1/2 inch border around the pastry (don't cut all the way).
  • Sides of the puff pastry lifted.
    Step 5
    Lift the sides.
  • Mushroom mixture added to the puff pastry.
    Step 6
    Spread mushroom mixture on pastry.
  • Topped with Gruyere cheese.
    Step 7
    Top with the Gruyére cheese.
  • Brushing puff pastry with an egg wash.
    Step 8
    Brush the edges of the pastry with the egg wash.
  • Baking the tart.
    Step 9
    Bake for 25-35 minutes until golden brown.
  • Last Step: Don't forget to share! Post a picture of your finished recipe here and on your favorite social network. Don't forget to tag Just A Pinch and include #justapinchrecipes!

Discover More

Collection: New Year Party
Ingredient: Vegetable
Method: Bake
Culture: American

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