INGREDIENTS
2
medium onions, thinly sliced
3 tbsp
butter
2 tbsp
brown sugar
1/2 tsp
white wine vinegar
1
sheet frozen puff pastry, thawed according to package directions
6 oz
brie, rind removed and slightly softened in the microwave, divided
2 tsp
caraway seeds, divided
canola or olive oil spray
1
egg
2 tsp
water
Coarse sea salt