Preheat broiler to high. Cut bell pepper in half and remove seeds. Place cut-side down on a baking sheet. Place under the broiler, and cook until the skin starts to blister, about 3-5 minutes. Remove from oven and immediately place bell pepper in a bowl and cover tightly with an airtight lid or plastic wrap. After 10 minutes, remove the plastic wrap. When pepper is cool enough to handle, peel skin off. Roasted bell peppers will keep in an airtight container in the refrigerator for about 4 days.
As an alternative, you can cover the roasted pepper with olive oil or even some seasonings.