1/2 teaspoon freshly ground black pepper (or to taste)
1/2 cup balsamic vinegar
1 teaspoon brown sugar
1 pound penne pasta
4 tablespoons butter, cut into pieces
1/2 cup freshly grated parmesan cheese, plus more for serving
Instructions
Heat the oven to 400°F
Trim and wash the asparagus (discard the tough ends). Cut the asparagus spears into 1-inch pieces.
Toss the asparagus with 1 tablespoon olive oil and 1/4 teaspoon of the salt and 1/4 of the pepper.
Place on a rimmed baking sheet. Roast until tender, about 15 minutes.
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 1/4 teaspoon pepper. Remove from the heat.
Meanwhile, cook the penne in a large pot of boiling salted water until done according to package directions. Drain the pasta and return to the pot.
To the pasta, add in the butter and vinegar mixture. Toss to combine well. Add in the asparagus, parmesan, and the remaining 1/2 teaspoon salt.
Serve immediately with additional parmesan cheese for serving.