Grilled Asparagus & Red Onions with Olive Oil and Balsamic Vinegar Recipe

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Sharlene Published: May 6, 2021 Modified: August 4, 2021
Grilled Asparagus & Red Onions with Olive Oil and Balsamic Vinegar Recipe

How To Make Grilled Asparagus & Red Onions with Olive Oil and Balsamic Vinegar

Sugar and balsamic vinegar round out the flavors of this grilled asparagus & red onions. It’s a great side dish with a marriage of sweet & charred flavors.

Preparation: 10 minutes
Cooking: 30 minutes
Total: 40 minutes



  • 2mediumred onions,peeled
  • lbsasparagus,(about 24 medium stalks), ends trimmed
  • 4tbspextra virgin olive oil
  • kosher salt
  • freshly ground black pepper
  • ½tspsugar
  • 1tbspbalsamic vinegar


  1. Preheat the grill to high.

  2. Cut onions in half from root to tip, then cut the halves into ½-inch slices. Pull the slices apart and place them into a disposable grill pan. 

  3. Toss with 2 tablespoons olive oil, ½ teaspoon kosher salt and ¼ teaspoon pepper.

  4. Place the spears in a baking dish and toss with 2 tablespoons olive oil, ¼ teaspoon kosher salt and ¼ teaspoon pepper.

  5. Place the pan of onions on the grill, along with the asparagus spears (be sure to place spears perpendicular to grates so they don’t fall through). Set the asparagus dish next to the grill (do not clean).

  6. Cover and cook the vegetables for 2 to 3 minutes. Open the cover and, using tongs, turn the asparagus. Cover and cook 1 to 2 minutes more, until the asparagus spears are nicely browned and tender-crisp.

  7. Remove the asparagus from the grill and place back in the baking dish. Stir the onions, cover, and continue cooking for about 15 to 25 minutes, stirring every few minutes, until tender and caramelized.

  8. In the meantime, transfer the asparagus spears to a cutting board and cut into 1½-inch pieces. Place back in the baking dish and toss with finished grilled onions.

  9. Add the sugar and balsamic vinegar and toss well. Taste and adjust the seasoning if necessary.

  10. Transfer to serving platter and serve hot or room temperature.


  • Calories: 182.74kcal
  • Fat: 13.78g
  • Saturated Fat: 1.97g
  • Monounsaturated Fat: 9.86g
  • Polyunsaturated Fat: 1.52g
  • Carbohydrates: 13.41g
  • Fiber: 4.69g
  • Sugar: 6.66g
  • Protein: 4.44g
  • Sodium: 567.07mg
  • Calcium: 58.27mg
  • Potassium: 438.33mg
  • Iron: 3.94mg
  • Vitamin A: 64.83µg
  • Vitamin C: 13.60mg
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