To roast sweet pepper halves, preheat oven to 425°F. Place pepper halves, cut sides down, on a foil-lined baking sheet. Roast for 20 to 25 minutes or until peppers are charred and very tender. Bring foil up around peppers and fold edges together to enclose. Let stand about 15 minutes or until cool enough to handle. Using a sharp knife, loosen edges of skins; gently pull off skins in strips and discard.