Roasted Onions

Prep: 10 min Cook: 40 min Cuisine: Mediterranean

Juicy roasted onions with a sweet and tangy balsamic glaze, perfect as a side or topping for various dishes, appealing to both vegetable lovers and food enthusiasts.

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Ingredients

  • medium yellow onions
  • 1/2 c. olive oil
  • 1/2 c. balsamic vinegar
  • salt and pepper (optional)

Instructions

  1. Use a flat roasting pan or casserole dish for roasting.
  2. Select medium yellow onions for roasting.
  3. If onions have soil, wipe them off gently without removing skins.
  4. Cut off 7 or 8 onions' root ends slightly so they can stand upright in the pan.
  5. Trim the other ends of the onions a little.
  6. Arrange the onions in the pan in rows, in a single layer, standing upright.

Tips & Substitutions

To enhance the flavor of roasted onions, consider adding herbs like thyme or rosemary before roasting. You can also substitute olive oil with avocado oil for a different taste. If you prefer a sweeter profile, drizzle a bit of honey over the onions. Ensure they are cut evenly for uniform cooking, and check for doneness by piercing them with a fork.

Serving Suggestions

Roasted onions make a delightful side dish or can be used as a topping for grilled meats or sandwiches. They pair wonderfully with Mediterranean recipes, adding depth to dishes like Cucumber Tomato Salad or Gwen's Vegetarian Soup. Serve them alongside crusty bread for a hearty meal, or incorporate them into grain bowls for added flavor.

Storage & Reheating

Leftover roasted onions can be stored in an airtight container in the refrigerator for up to 5 days. To reheat, place them in a preheated oven at 350°F (175°C) for about 10-15 minutes until warmed through. Alternatively, you can sauté them briefly in a skillet over medium heat for quicker reheating.

Nutrition & Diet Analysis (per serving)

Each serving of Roasted Onions contains roughly 293 calories, with 0g protein, 5g carbohydrates, and 30g fat. Note that it is relatively high in sodium, at 492mg per serving (21% of the Daily Value).

293 kcal 15% DV
Protein Fat Carbs

Macronutrients

Protein 0.2g
Total Fat 30.1g 39% DV
Carbs 5.2g 2% DV
Fiber 0g
Sugar 4.5g 9% DV

Electrolytes

Sodium 492.1mg 21% DV
Potassium 35.7mg 1% DV

Vitamins & Minerals

Vitamin C 0mg
Calcium 9mg 1% DV
Iron 0.4mg 2% DV
Diet fit Keto-friendly Under 400 cal

Estimated from ingredients & per-serving nutrition — verify against package labels for allergies or strict diets.

* % Daily Values based on a 2,000 calorie diet (FDA 2020).

Frequently Asked Questions

Can I use other types of onions for roasting?

Yes, you can use other types of onions such as red or sweet onions. However, yellow onions are preferred for their balanced flavor. Red onions will add a slight sweetness and vibrant color, while sweet onions will enhance the overall sweetness of the dish.

How do I know when the onions are done roasting?

The onions are done when they are tender and caramelized, typically after 30-40 minutes in the oven at 400°F (200°C). You can check for doneness by inserting a fork or knife; it should slide in easily without resistance. Keep an eye on them to prevent burning.

Can I roast the onions ahead of time?

Absolutely! You can roast the onions a day in advance and store them in the refrigerator. Just make sure they are cooled completely before storing. This makes meal prep easier, and you can reheat them quickly when ready to serve.

Nutrition is estimated from USDA FoodData Central ingredient data and may vary with brand, portion and preparation — see our methodology. This information is for general educational purposes only and is not medical or dietary advice (disclaimer).

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