Prepare pasta according to package directions; drain. Meanwhile, in large skillet, heat oil over medium heat. Add meatballs; cook, stirring occasionally, until heated through (about 10 minutes).
In large bowl combine pasta sauce, ricotta, half & half and ¾ cup Parmesan cheese; salt to taste. Stir in pasta and meatballs. Transfer to a greased 2½-quart baking dish.
Top with remaining Parmesan cheese. Bake in a preheated 375°F oven 30 minutes or until bubbly and golden brown.
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