Description
This Tomato Sauce Onion Boil recipe features large sweet onions boiled until tender, filled with a savory butter and seasoning mixture, and then optionally roasted to enhance their flavor and texture. The process highlights the natural sweetness of onions combined with rich butter and olive oil, making a simple yet elegant side dish perfect for any meal.
Ingredients
Scale
Onions
- 4 large sweet onions, peeled and ends trimmed
Butter and Oil
- 2 tablespoons unsalted butter (½ tablespoon per onion)
- 1 tablespoon olive oil
Seasoning
- ½ teaspoon salt
- 1 tablespoon seasoning, sauce, or cheese of choice
Instructions
- Preheat the oven: Preheat your oven to 375°F (190°C) to prepare for optional roasting later in the recipe.
- Prepare the onions: Scoop out the top center of each onion, about one-third of the way down, to create a well that will hold the filling.
- Boil the onions: Place the prepared onions in a large pot of boiling water and cook for 20 minutes or until they are slightly tender but still hold their shape. Once done, drain the onions and allow them to cool slightly.
- Add butter to the wells: Place half a tablespoon of unsalted butter into each onion’s hollowed-out well to add richness and moisture.
- Season the onions: Combine olive oil, salt, and your choice of seasoning or sauce; drizzle this mixture evenly over each onion, allowing it to seep between the layers for enhanced flavor.
- Fill the onions: Spoon your chosen seasoning, sauce, or cheese of choice into each onion well, creating a flavorful center.
- Optional roasting: Wrap each onion individually in foil and roast in the preheated oven for 15–20 minutes until fully tender and warmed through.
- Optional broiling: For a golden, slightly crisp top, open the foil and broil the onions for 2–3 minutes, keeping a close eye to prevent burning.
- Serve with buttery juices: Before serving, spoon any buttery juices collected in the foil over the onions to enhance their taste and moisture.
Notes
- You can customize the filling with various seasonings, sauces, or cheeses to suit your taste preferences.
- Wrapping onions in foil helps retain moisture during roasting, but you can skip this step for a firmer texture.
- Broiling at the end is optional but adds a lovely golden finish to the top.
- Make sure not to over-boil the onions to keep them from becoming too mushy.
