Onion Mushroom Tart

Irit Birman


Easy to make yet very delicious


☆☆☆☆☆ 0 votes

30 Min
30 Min


  • 3 Tbsp
    olive oil, extra virgin
  • 2
    large onions cut in half and sliced thin
  • 1 lb
    baby bella mushrooms sliced
  • 1 tsp
  • 1/4 tsp
  • 1/4 c
    white wine
  • 1 pkg
    puff pastry sheet, thawed
  • 1
    egg + 1 tbsp water beaten (egg wash)
  • 1 c
    grated gruyère cheese

How to Make Onion Mushroom Tart


  1. Heat olive oil in a large saute pan. Add onions stirring continuously until they start to soften. Add mushrooms, salt and pepper. Stir till mushrooms release their liquid.
  2. Add wine and cook until almost all evaporate. Remove from heat and set aside.
  3. Preheat oven to 350℉
  4. Line a baking sheet with parchment paper.
    Unfold defrosted pastry sheets. Lay them side by side (along the long side) and press to seal.
    With a sharp knife score 1/2 inch border around pastry(don't cut all the way) Lift the sides.
  5. Spread mushroom mixture on pastry. Top with gruyére cheese.
  6. Brush the edges of the pastry with the egg wash.
  7. Bake for 25-35 minutes until golden brown.

Printable Recipe Card

About Onion Mushroom Tart

Course/Dish: Vegetable Appetizers
Main Ingredient: Vegetable
Regional Style: American

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