Balsamic Asparagus Penne

This was made a long time ago but I remember loving it.  It was great for a summer night and good warm or at room temperature.  I have to remember to make this when asparagus is in season again. 

recipe source Mel's Kitchen Cafe

INGREDIENTS:
1 pound fresh asparagus spears
1 tablespoon olive oil
¾ teaspoon salt
½ teaspoon freshly ground black pepper
½ cup balsamic vinegar
1 teaspoon light or dark brown sugar
1 pound penne pasta
4 tablespoons butter, cut into pieces
1/3 cup freshly grated Parmesan cheese, plus more for serving

DIRECTIONS:
Heat the oven to 400 degrees. Snap the tough ends off the asparagus and discard them. Cut the asparagus spears into 1-inch pieces. Put the asparagus on a rimmed baking sheet and toss with the oil and ¼ teaspoon of the salt and ¼ of the pepper. Roast until tender, about 10 minutes. Remove from the oven and set aside.

While the asparagus roasts, put the vinegar in a small saucepan. Simmer over medium heat until the vinegar is reduced to about 3 tablespoons, about 5-10 minutes. Stir in the brown sugar and the remaining ¼ teaspoon pepper. Remove from the heat.

Cook the penne in a large pot of boiling salted water until just done, 11-13 minutes. Drain the pasta and return to the pot. Stir in the butter and vinegar mixture. Toss to combine well. Add in the asparagus, Parmesan, and the remaining ½ teaspoon salt. Serve immediately with additional Parmesan cheese for serving.