Mushroom, carmelized onion, spinach, and gruyere quiche. Caramelizing the Onions and Preparing the Quiche. I made this quiche because I had a TON of onions to use from my weekly bag and love gruyere. I was a little afraid it would be dull with just the caramelized onions and cheese for filling, but was astonished at how delicious and deep the flavor of.

The caramelized onion with spinach and Gruyere is my all-time favorite. I usually use fresh spinach but the frozen box is easy, too. Crustless quiche is a no brainer in our house. You can cook Mushroom, carmelized onion, spinach, and gruyere quiche using 9 ingredients and 8 steps. Here is how you cook that.

Ingredients of Mushroom, carmelized onion, spinach, and gruyere quiche

1. Prepare 1 of puff pastry.
2. Prepare 1/2 of onion thinly sliced.
3. You need 1 pkg of mushrooms sliced.
4. Prepare 2-3 handfuls of spinach.
5. Prepare 3 of eggs.
6. It's 2 cups of half and half.
7. Prepare 3/4 cup of gruyere.
8. You need of Salt.
9. You need of Pepper.

We regularly throw together leftover vegies, a little cheese, and eggs fresh from our chickens together, pop into the oven. Caramelized Onion Quiche is the perfect addition to your next brunch or luncheon. Gruyere cheese and bacon combine with caramelized onions for a quiche that can't be beat. Flat-leaf parsley, chives, and mint add a fresh, pretty finish to this tasty dish.

Mushroom, carmelized onion, spinach, and gruyere quiche instructions

1. Preheat oven to 375°.
2. Thaw out puff pastry and put into a deep dish pie pan. I cut off the long corners and filled in any gaps. Blind bake for 10 mins..
3. Saute onions once they start carmelizing add mushrooms. Once mushrooms are browned add spinach until wilted. Salt and pepper to taste. Let mixture cool.
4. Mix together eggs, half and half salt and pepper to taste..
5. Pour mushroom mixture into the bottom of the puff pastry. Make sure to spread it out evenly so every bite has a little bit ove everything in it..
6. Sprinkle shredded gruyere..
7. Pour egg mixture in pie shell and bake for 45 mins or until set..
8. Enjoy!.

This Caramelized Onion and Thyme Quiche is it! A delicious vegetarian entree that you can make-ahead! Let the quiche rest a bit after baking and serve — or let it come to room temperature, then cover and refrigerate until you want to serve it. You must add these caramelized onion, mushroom, apple, and gruyere bites to your Thanksgiving appetizer list; they will be the star of the party! It looks like celery juice is a food trend this year.