This side dish spotlights the humble onion, is easy to make, and tastes absolutely delicious. The silky, sweet and savory caramelized wedges will win you over from the first bite.
Get ready. Heat the oven to 400° F. Line a rimmed baking sheet with foil.
Prep the onions. Trim the ends off the onions, peel and cut them into quarters. Arrange on the prepared baking sheet and drizzle with 2 tablespoons extra virgin olive oil. Use your fingers to coat them and season with a pinch of salt and freshly ground black pepper. Roast for 15 minutes.
Make the vinaigrette. Meanwhile, in a small bowl, combine apple cider vinegar, balsamic vinegar, salt, pepper, and thyme. Slowly whisk in the olive oil, until the vinaigrette is emulsified.
Baste the onions. Remove the pan from the oven and brush the onions with about half the vinaigrette, turning them to make sure all sides are coated. Return the onions to the oven and roast until the wedges are nicely caramelized and slightly blackened in spots, another 15 to 20 minutes.
Finish and serve. Gently transfer the onions into a bowl. Don’t worry if they fall apart a little. Drizzle the remaining vinaigrette over them and toss gently with a spoon. Taste and adjust the seasoning with more salt or pepper if needed. Let the onions marinate for about 15 minutes before serving.