Cut the onions in half and peel away the dry, outer layers and preheat the oven to 350°F (175°C).
In the pan, combine olive oil, thyme, salt, and pepper, stirring to mix. Place the onions cut side down into the oil and spice mixture, ensuring they are well-coated.
Prepare a baking sheet or oven-safe pan by lightly greasing or lining with parchment. Roast in the preheated oven for 50-60 minutes, or until the onions are tender and caramelized.
Cool slightly, slice, and serve your flavorful roasted onions as a side dish or topping!
Notes
Choose Sweet Onions: Varieties like Vidalia or Walla Walla onions caramelize beautifully and develop a rich, sweet flavor when roasted.Cut Evenly: Slice the onions uniformly to ensure they roast evenly and achieve a consistent texture.Don’t Skip the Oil: Generously coat the onions in olive oil for a golden caramelization and to prevent them from sticking to the pan.