Cook pasta according to package directions; set aside.
Stir together Parmesan cheese and next 6 ingredients. Spread mixture evenly over one side of pasta.
Layer with 1/3 pasta, cheese side up, on bottom of a 13- x 9-inch baking dish coated with cooking spray. Top with half each shrimp, crab, mozzarella and provolone cheese, spinach, basil, and oregano . Repeat layers once; top with remaining 1/3 pasta, cheese side down.
Combine butter and lemon juice; spread mixture evenly over pasta. Drizzle stock evenly over top; cover with foil. Bake at 400° for 20 minutes or until heated through. Let stand 10 minutes before serving.