Balsamic-Rosemary Melting Onions

Whether you’re looking for a vegetable to complement a roast or steak, or a new, easy appetizer, these Balsamic Rosemary Melting Onions are your solution. Sweet onions are loaded with antioxidants and become melt-in-your-mouth caramelized while roasting as they soak up the rich balsamic vegetable broth. Dijon mustard adds another subtle layer of flavor, while rosemary comes in with an unexpected woody freshness that perfectly contrasts the richness of the rest of this dish. A bit of butter is the finishing touch, creating a deep, silky sauce. Keep reading for our expert tips, including ingredient substitutions. 

Tips from the EatingWell Test Kitchen

These are the key tips we learned while developing and testing this recipe in our Test Kitchen to make sure it works, tastes great and is good for you too!

• To save money, consider purchasing a 5-pound bag of onions instead of buying them individually. And this way, if you encounter a bad onion, you’ll have plenty more.
• Use a metal pan for optimal roasting results. This also eliminates the risk of glass bakeware shattering when you add the liquid to the hot pan.
• If you don’t have fresh rosemary, you can substitute with half the amount of dried.
• Feel free to replace the rosemary with thyme or any other aromatic herb you prefer.

Nutrition Notes

• Onions are packed with fiber and powerful plant compounds, including antioxidants, that fight inflammation and disease. Eating onions regularly has been linked with a lower risk of heart disease and some cancers. 
• Vegetable broth doesn’t typically add much in the way of nutrition, other than hydration—though this can vary, depending on the brand. Regular broth does have high amounts of sodium, which is why we recommend using a lower-sodium broth for this recipe. If all you have is regular vegetable broth, consider reducing the amount of salt you add to this recipe, or nix it altogether.