Heat oven to 375°F. In 10-inch skillet, crumble sausage. Cook over medium-high heat about 8 minutes, stirring frequently, until sausage is no longer pink; drain well.
In ungreased 11x7-inch (2-quart) microwavable dish, stir sauce mix (from Hamburger Helper box) and water until blended. Microwave uncovered on High 1 to 2 minutes or until sauce is thickened. Stir in uncooked pasta (from Hamburger Helper box), sausage, bell pepper, mushrooms and zucchini.
In small bowl, mix ricotta, mozzarella and Parmesan cheeses. Spoon cheese mixture evenly over sausage mixture.
Bake uncovered 40 to 50 minutes or until top is golden brown and sauce is bubbly.