Preheat oven to 375°F. Prepare pasta according to package directions; drain.
In small saucepan, bring broth to a boil. Add lentils; reduce heat. Simmer 35 minutes, covered, or until lentils are tender; drain.
In a large bowl, combine pasta sauce, vinegar and lentils. Reserve 1 cup of sauce.
Combine pasta with remaining sauce and toss to coat well. Spread mixture into an 11 x 7-inch baking dish. Spoon reserved sauce over top, covering pasta completely; sprinkle with mozzarella cheese.
Bake 10 minutes or until cheese melts.
Servings 0