This easy caramelized onion tart makes for a great appetizer. Also, be sure check out the Quick Eats Video page to see how easy this recipe is in action!
In a pan over medium-low heat, melt butter and add the sliced onions. Cook onions, stirring occasionally until colored a deep caramelized brown.
Preheat oven to 400 degrees.
Line a sheet tray with parchment and lay out puff pastry. Add onions and evenly spread them out making sure to reach the far corners.
Sprinkle of cheese, fresh thyme, a crack of ground pepper, and finish with a drizzle of balsamic vinegar.
Bake in oven for 40 minutes or until puffed and golden.