In a large skillet, cook beef over medium heat 6-8 minutes, breaking into small pieces; drain. Transfer to a large bowl; stir in tomatoes and beans. In a small bowl, combine eggs and ricotta cheese, cumin, oregano, and salt and pepper.
Return 1 cup meat mixture to the skillet; spread evenly. Layer with 1 cup ricotta mixture, 1-1/2 cups marinara sauce and half of the noodles, breaking noodles to fit as necessary. Repeat layers. Top with remaining marinara sauce.
Bring to a boil. Reduce heat; simmer, covered, 18-20 minutes or until noodles are tender. Remove from heat. If desired, sprinkle with mozzarella cheese. Let stand 2 minutes or until cheese is melted. Sprinkle with oregano.