Penne with roasted asparagus and balsamic butter

Penne with Roasted Asparagus and Balsamic Butter

PENNE AND ROASTED ASPARAGUS AND BALSAMIC BUTTER: 1 lb asparagus; 1 T olive oil, 1 tsp salt; tsp fresh ground pepper; cup plus 2 T balsamic vinegar; tsp brown sugar; 1 lb penne; lb butter, cut into pieces; cup grated parmesan cheese, plus more for serving.