Penne with Roasted Asparagus and Balsamic Butter
Balsamic vinegar is reduced to make a thick, sweet glaze to toss with butter, pasta, and whatever vegetable is in season. Since the formula is so simple, it's easy to substitute seasonal vegetables–including broccoli, green beans, or roasted bell pepper strips–for the asparagus.Simmering the balsamic vinegar both mellows and thickens it. When tossed with the hot pasta and the butter, it forms a smooth, uniquely flavored sauce.