8 small onions, peeled
3 thyme branches
2 tbsp. Brown sugar
2 tbsp. Balsamic vinegar
1 tbsp. Unsalted butter
salt and pepper to taste
1 lb. Puff pastry or pie dough

peel the onions carefully to retain as much of the root end as possible so the onions stay together during the cooking process
cut the onions in half north to south
pre-heat the oven to 350 degrees
in a non stick pan heat the vinegar, butter and brown sugar
add the thyme sprigs and the onions cut side down
saute the onions until they begin to brown and place the pan in the oven
place the pan in the oven and cook until the onions are soft aprox 20 -–30 minutes
remove from the oven and turn the heat up to 400 degrees
roll out the pastry and cover the onions
bake until the pastry is crisp aprox 10 minutes
remove from the oven and place a plate over the pan CAREFULLY turn the tarte over the juices in the pan are very hot
serve the tart warm