I love caramelized onions but being a busy cook, I often end up with burnt onions if I'm distracted. My mother taught me this oven method and it's just the thing when I'm preparing my OAMC and need onions. I usually throw 1/4 - 1/2 cup in the zip lock bag when assembling anything that calls for ONIONS! Another nice thing about using the oven for these is how much can be prepared at one time. I chop my onions into big 1" pieces if using for soups, stews, or roasted meats. If using in a dish that will be frozen, cool the mixture before adding to other ingredients. You can also add a little cayenne pepper before baking if you want to spice them up. And if you're making burgers for the family, slicing them into 1/2" rings (and separating)before baking looks pretty cool.