Cook manicotti to desired doneness as directed on package. Drain; cover to keep warm.
Meanwhile, heat oven to 350°F. Spread 1 cup of the spaghetti sauce in bottom of ungreased 12x8-inch (2-quart) baking dish.
In large bowl, combine cream cheese, basil and garlic powder; mix well. Add spinach, Parmesan cheese and tofu; mix with fork until texture resembles cottage cheese.
Stuff tofu mixture into cooked manicotti; arrange in baking dish over sauce. Top with remaining 1 cup sauce. Cover tightly with foil.
Bake at 350°F. for 25 to 35 minutes or until thoroughly heated. Uncover; sprinkle with mozzarella cheese. Let stand 5 minutes before serving.