1. Preheat oven to 400 degrees F. Line a cookie sheet with foil and grease with 1/4 teaspoon. of the olive oil. Set aside.
2. In a medium mixing bowl, combine the remaining oil, butter, vinegar, salt, and pepper. Mix well. Add asparagus to bowl and toss well.
3. Spread asparagus on cookie sheet and roast for 6 minutes. Roast up to 2 additional minutes if a more tender asparagus is desired.
4. To serve, divide asparagus among plates and drizzle with pan drippings.
Source: Hannaford fresh Magazine, March - April 2007