Penne de mantequilla marrón balsámico

Ingredients

• 1 8-ounce box Banza penne pasta
• ½ medium butternut squash, peeled and chopped into ½ -inch cubes
• ½ pound brussels sprouts, trimmed with outer leaves removed, cut into thirds or quarters
• ½ red onion, sliced
• 2-3 leaves fresh sage, roughly chopped
• 2 tablespoons extra-virgin olive oil
• 3 tablespoons balsamic vinegar, divided
• 6 tablespoons unsalted butter
• 1/4 cup freshly grated aged Parmesan cheese
• salt and pepper, to taste