Cook the penne pasta according to package instructions until al dente. Drain and set aside.
Heat olive oil in a large skillet over medium heat.
Add the sliced chicken sausage to the skillet and cook for 5-6 minutes, stirring occasionally, until browned and heated through.
Add the minced garlic to the skillet with the sausage and cook for 1 minute until fragrant.
In a small bowl, whisk together honey, soy sauce, chicken broth, crushed red pepper flakes, and black pepper.
Pour the honey garlic sauce into the skillet with the sausage and garlic. Stir to combine and bring to a simmer.
Add the cooked pasta to the skillet and toss to coat evenly with the sauce.
Cook for 3-4 minutes, stirring occasionally, until the sauce thickens and becomes sticky.
Sprinkle shredded mozzarella cheese over the pasta and sausage mixture. Cover the skillet with a lid and cook for 2-3 minutes until the cheese melts.
Remove from heat and garnish with chopped fresh parsley before serving.