Real Recipes From Real Home Cooks ®

onion mushroom tart

(1 rating)
Blue Ribbon Recipe by
Irit Birman
The Villages, FL

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 @kitchencrew
(1 rating)
yield 8 -10
prep time 30 Min
cook time 30 Min
method Bake

Ingredients For onion mushroom tart

  • 3 Tbsp
    olive oil, extra virgin
  • 2 lg
    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 lg
    egg + 1 Tbsp water beaten (egg wash)
  • 1 c
    grated Gruyère cheese

How To Make onion mushroom tart

  • Saute onions in oil.
    Heat olive oil in a large saute pan. Add onions stirring continuously until they start to soften.
  • Add mushrooms, salt, and pepper. Add wine.
    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.
    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.
    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.
    Lift the sides.
  • Mushroom mixture added to the puff pastry.
    Spread mushroom mixture on pastry.
  • Topped with Gruyere cheese.
    Top with the Gruyére cheese.
  • Brushing puff pastry with an egg wash.
    Brush the edges of the pastry with the egg wash.
  • Baking the tart.
    Bake for 25-35 minutes until golden brown.