Start with sliced onions and olive oil in a saute pan on medium-high heat. You want a big pan so the onions have room to do their thing. And make sure you have plenty of sliced onions. They're going to shrink down significantly when caramelized.
Step 2: Add Salt
Hit them with some salt. This will draw out the moisture. As they cook, they'll first get soft, then juicy. Then, this concentrates and they begin to brown, or caramelize, making them sweet and delicious. It will take a while, like 10 to 15 minutes.
Step 3: Stir and Shake
Stir occasionally and enjoy the process. Give the pan a shake every once in a while.
Step 4: Add Water
Feel free to add some water to help release those caramel-colored bits of goodness on the bottom of the pan. Keep going until the onions are tender and a deep golden brown.
Step 5: Add Extra Flavor
If you want to be fancy, add some wine or liquor for extra flavor. Madeira wine or brandy goes well with onions. Always taste what you cook and add some seasoning if needed. Tip: Caramelized onions are great on burgers and steaks, as well as in salads and soups.
Step 6: You're Finished
Following these simple steps will give you an awesome onion garnish that makes everything taste better.
