Save A sweet, tender Vidalia onion roasted whole until meltingly soft, with aromatic herbs and butter. This is a simple yet elegant side dish that transforms humble onions into something truly special.
I first made Onion Boil on a whim for a family dinner, and its buttery aroma filled the kitchen, making everyone eager for just a taste. Since then, it's been a favorite for gatherings when I need something quick yet comforting.
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Ingredients
- Vidalia onions: 4 large, unpeeled (or other sweet onions)
- Unsalted butter: 4 tbsp
- Fresh thyme: 4 sprigs
- Garlic: 4 cloves, peeled
- Kosher salt: 1 tsp
- Freshly ground black pepper: ½ tsp
- Optional garnish - Fresh parsley: 2 tbsp chopped
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Instructions
- Preheat Oven:
- Set your oven to 400°F (200°C).
- Trim and Prepare Onions:
- Trim just the root ends and tops so onions sit flat, leaving skins on.
- Score Tops:
- Use a paring knife to cut a shallow X into the top of each onion.
- Season:
- Place onions on heavy-duty foil and sprinkle with salt and pepper.
- Add Aromatics:
- Press 1 tbsp butter, 1 thyme sprig, and 1 garlic clove into each onion's top.
- Wrap and Bake:
- Wrap onions tightly in foil, set on a baking sheet, and roast for 1 hour 10 minutes.
- Finish and Serve:
- Carefully unwrap, remove skins, transfer to plates, spoon over melted butter, and sprinkle with parsley if desired.
Save This recipe was a hit at our last Sunday lunch, with every family member returning for seconds and asking for the secret behind its irresistible taste.
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Serving Suggestions
Onion Boil pairs beautifully with roast meats, grilled vegetables, or can be enjoyed as a standout vegetarian main along with crusty bread.
Substitutions & Variations
You can swap Vidalia onions with Walla Walla or Maui onions for different flavors, and add balsamic vinegar or smoked paprika for a new twist.
Allergy & Dietary Notes
Contains dairy due to butter. For dairy-free, swap with vegan butter or olive oil and always verify packaged ingredients for hidden allergens.
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Lightly sprinkle fresh parsley on top for a burst of color and flavor. Enjoy warm, straight from the oven for best texture.
Kitchen Guide
- → What type of onions work best for roasting?
Sweet onions like Vidalia, Walla Walla, or Maui are ideal due to their natural sweetness and tenderness when cooked.
- → How do you ensure the onions cook evenly?
Wrapping each onion tightly in foil helps retain moisture and promotes even cooking during roasting.
- → Can I add other herbs or spices?
Yes, herbs like thyme are classic, but additions like smoked paprika or a splash of balsamic vinegar can enhance flavor.
- → Is it necessary to remove the onion skins after roasting?
Yes, peeling the skins after cooking reveals the tender, sweet interior ready to serve.
- → What dishes pair well with roasted Vidalia onions?
They complement roast meats, grilled vegetables, or can be served as a flavorful vegetarian side with bread.
