Caramelized Onion with vinegar

3 lbs onions , sliced thin 1/4 cup olive oil 1/4 cup butter 1 teaspoon sugar 2 tablespoons white wine vinegar 3/4 cup dry white wine 1 cup chicken broth 1 1/2[...]

2 teaspoons olive oil 2 small red onions , thinly sliced 2 small yellow onions , thinly sliced 1 tablespoon white balsamic vinegar 1 sheet frozen puff pastry[...]

2 teaspoons olive oil 2 small red onions, thinly sliced 2 small yellow onions, thinly sliced 1 tablespoon white balsamic vinegar 1 sheet frozen puff pastry[...]

3 lbs onions , sliced thin 1/4 cup olive oil 1/4 cup butter 1 teaspoon sugar 2 tablespoons white wine vinegar 3/4 cup dry white wine 1 cup chicken broth 1 1/2[...]