Caramelized Onion Sauce without wine

4 yellow onions , sliced very thin 3 tablespoons butter 2 tablespoons olive oil 2 teaspoons sugar 1/4 teaspoon salt 1/4 teaspoon black pepper 8 ounces cream[...]

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[...]