Caramelized Onion without beans hamburger brownies

1 teaspoon olive oil 3 large red onions , thinly sliced 1 tablespoon maple syrup or 1 tablespoon light brown sugar 1 tablespoon balsamic vinegar 2 teaspoons[...]

3 tablespoons butter 3 tablespoons vegetable oil 3 large yellow onions , roughly chopped 2 large granny smith apples , peeled, cored, and cut into medium[...]

3 tablespoons butter 3 tablespoons vegetable oil 3 large yellow onions , roughly chopped 2 large granny smith apples , peeled, cored, and cut into medium[...]

1 teaspoon olive oil 3 large red onions , thinly sliced 1 tablespoon maple syrup or 1 tablespoon light brown sugar 1 tablespoon balsamic vinegar 2 teaspoons[...]