Preheat oven to 350 degrees F. In a large non-stick skillet, over medium-high heat, cook and crumble ground beef and onion together until beef is no longer pink. Drain any grease.
Stir in minced garlic, spaghetti sauce, chive and onion cream cheese, Italian seasoning and 1/2 cup of the Mozzarella cheese. Cook and stir mixture until cheese is melted; about 5 minutes.
Meanwhile, boil the penne pasta in pot of water until al dente. Drain water. Gently stir the cooked penne pasta into the sauce mixture.
Carefully pour mixture into a greased 8×8-inch baking dish spreading out evenly. Sprinkle the remaining 1/2 cup of Mozzarella cheese evenly over the top.
Bake, uncovered, for 20 minutes or until hot and bubbly. Let stand 10 minutes before serving. Enjoy! ♥