These caramelized onions are given the French onion soup treatment to make a satisfying side dish or topping for chicken and burgers. Finished with balsamic and fresh herbs, these onions are big on flavor.
Melt the butter in a heavy-bottomed skillet over medium heat. Add the onions, thyme, salt, and pepper. Cook, stirring frequently until the onions are very soft, and deep golden-brown, 25 to 30 minutes. If the onions begin to burn turn down the heat and stir more often.
Add the garlic and cook for 1 minute. Add the beef broth, scrape up any brown bits. Bring the broth to a boil and simmer until it is reduced by half. Remove from heat, remove the thyme sprigs, and stir in the balsamic.
Notes
If the onions begin to dry out, you can add 2 tablespoons of water.
Store leftover onions in airtight container for up to 4 days.
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