Balsamic Roasted Onion | Cook for Your Life

Balsamic Roasted Onion

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5 out of 5 stars (based on 11 reviews)

Clock Icon for Prep Time 15 min prep
Person Icon for Serving Size 4 servings
Carrot Icon for Number of Ingredients Size 4 ingredients

Red onions are full of cancer fighting flavonoids but they rarely get the chance to shine on their own, until now. We’ve simply baked sweet red onions in sweet balsamic vinegar. They are so delicious.


  • 2 medium red onions, peeled and quartered
  • 2 tablespoons balsamic vinegar
  • 1 tablespoon olive oil
  • Salt and pepper, to taste
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Nutrition Facts


59 cals


4 g

Saturated Fat

1 g

Polyunsaturated Fat

0 g

Monounsaturated Fat

3 g


7 g


4 g


1 g


1 g


155 mg


  1. Preheat the oven to 400 degrees.
  2. Place the quartered onions onto a baking tray lined with parchment paper. Drizzle with oil and vinegar, a generous pinch of salt and a pepper.
  3. Roast for 30 minutes, flipping halfway through until caramelized and tender. Serve warm.

Chef Tips

For extra sweetness, use Saba, which is a concentrated form of Balsamic vinegar.

Registered Dietitian Approved

Our recipes, articles, and videos are reviewed by our oncology-trained dietitians to ensure that each is backed with scientific evidence and follows the guidelines set by the Oncology Nutrition for Clinical Practice, 2nd Ed., published by the Oncology Nutrition Dietetic Practice Group, a professional interest group of the Academy of Nutrition and Dietetics, and the American Institute for Cancer Research and the American Cancer Society