Flatbread With Caramelized Onions & Cheese - cooking recipe

Ingredients

2 tablespoons olive oil
3 large onions, chopped
1 tablespoon brown sugar
2 tablespoons balsamic vinegar
1/2 teaspoon salt
1/2 teaspoon pepper
1/2 lb frozen puff pastry (defrosted but cold)
6 ounces brie cheese, diced (rind removed)
6 ounces mild blue cheese, diced
2 tablespoons chopped fresh chervil or 2 tablespoons parsley

Preparation

Heat oil over medium high heat in a large skillet.
Add onions; cook until wilted& starting to brown.
Add sugar, vinegar, salt& pepper.
Reduce heat& cook gently for 15- 25 minutes or until onions are caramelized& brown.
Cool.
Roll pastry into a rectangle approximately 12 x 16 inches. I don't use the sheets of puff pastry - I prefer to use the 375gm package of Tenderflake Puff Pastry. I start rolling it out on my counter, then I transfer it to my baking tray (which has been lined with parchment paper) and roll the pastry to fit the tray. Since puff pastry is very \"forgiving\", you can \"cut & paste\" if necessary.
Spread onions over pastry.
Dot with cheese& sprinkle with chervil.
If you are preparing this for a party, you can prepare to this point and refrigerate- then bake later.
Bake in preheated 400F oven for 20- 25 minutes or until cheese has melted& pastry is crisp.
When removed from the oven, it will be puffed right up but allow it to cool for 5 minutes & it will fall back down. Cut into 20 serving pieces - this is easier done with kitchen scissors instead of a knife - then cut each piece in half diagonally.