“If you are searching for a plain everyday onion tart recipe, then this is not for you. The flavor combination of the rosemary and the two cheeses along with all the other ingredients create a total taste sensation! Try to use both kinds of cheeses for this, the two combined really make a difference in the taste, but you can use all Swiss if you like. This is an award-winning onion tart recipe, and one that I have served many times to my guests for a brunch, or if you desire it makes a wonderful light dinner served with a side salad. This recipe will serve 6-8 people, if you are making this to serve to guests, I suggest to prepare two of them, as everyone will definately want seconds, it is THAT delicious! Prep time does not include making the crust.”

Ingredients Nutrition


  1. For the pastry: prepare your favorite pastry recipe and chill in the fridge for 30 minutes.
  2. Roll the dough between two pieces of wax paper into a 13-inch round and about 1/4-inch thick.
  3. Place the dough into a 9-1/2 inch tart pan with a removable bottom; trim any excess dough, leaving about 1/2-inch overhang.
  4. Fold the excess dough over the sides (if the dough is too soft to work with, refrigerate for about 20 minutes or freeze for 10 minutes).
  5. Prick the bottom of the shell all over with a fork.
  6. Line crust with foil and fill with dried beans.
  7. Bake in a 400° oven for 20 minutes or until very lightly coloured.
  8. Remove from oven and remove foil with the dry beans; set aside.
  9. Reduce the oven temperature to 350°.
  10. For the filling: cook the bacon in a large skillet over medium heat until crisp; remove and set on paper towel.
  11. Drain all fat but about 2 tablespoons.
  12. Add the oil to the skillet, and heat to medium heat.
  13. Add in onions and garlic; saute for about 15 minutes or until soft, stirring more frequently towards the end of cooking time.
  14. Add in sliced mushrooms, rosemary, salt and pepper to skillet; cook for about 10 minutes, or until mushrooms are tender and onions are light golden brown in colour; remove from heat.
  15. Chop the bacon and add to the onion mixture.
  16. Combine both cheeses in a bowl and sprinkle half of the cheese into the bottom of the tart shell.
  17. Spoon the onion mixture over top of the cheese.
  18. Sprinkle with remaining cheese.
  19. Bake for about 25 minutes, or until the cheese is golden.
  20. Serve hot or at room temperature.
  21. Delicious!

Join the Conversation

  • all
  • reviews
  • tweaks
  • q & a