These Mushroom and Caramelized onion puff pastry bites are going to be the HIT of your next party or Family Gathering!! They are really easy to make and people wont be able to stop eating them! You can also make one big tart and slice it up afterwards! They are super flaky and the sweetness from the onion and saltiness from the cheese is addicting! Hope you can give them a try soon!

Ingredients:
1 pkg prepared puff pastry dough...thawed
4 T butter...divided in half
2 T olive oil
6 oz sliced cremini or white mushrooms
1 large onion, cut in half and thinly sliced
1 large shallot, minced
1/2 t dried tyme
1 T sugar
1 T balsamic Vinegar
4 oz freshly shredded gruyere cheese
1 egg

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