Prepare all of the ingredients. Boil Water for Pasta. Preheat oven to 400deg.
In a large saute pan over medium-high heat, add oil, onions and garlic. Cook for 2 minutes then add ground beef, salt and parsley. Crumble and cook for 8 minutes.
Add rigatoni to boiling water and cook for 5 minutes. Drain and transfer to 13x9 baking dish.
Add beef broth, cream cheese, 2 cups pepper jack, zucchini, squash, and beef mixture to baking dish. Stir to combine. Cover with foil and place in oven for 25 minutes. Remove foil, sprinkle with remaining cheese and cook another 10 minutes.