Heat oven to 350°F. Spray 9 inch springform pan with nonstick cooking spray. Cook pasta to al dente and drain. Brown ground beef with Italian seasoning and salt. Drain. Stir in salsa and remove from heat. Mix together alfredo sauce, eggs and 1 cup cheese. Stir in pasta. Toss spinach with 1/2 cup cheese. Spoon half of pasta mixture into pan. Sprinkle spinach mixture over pasta layer. Top with even layer of beef mixture. Top with remaining pasta. Sprinkle with remaining cheese. Bake 1 hour till hot in center and top is golden. Run knife around edge of pan to loosen and let stand 10 minutes. Remove pan side and sprinkle with parsley.