Bring a large pot of lightly salted water to a boil. Add pasta and cook for 8 to 10 minutes or until al dente; drain.
In a large saucepan, melt butter over medium heat. Stir in flour until smooth. Gradually add chicken broth, half-and-half, garlic powder, oregano, basil, pepper, and salt. Bring to a boil, stirring constantly. Reduce heat and simmer for 2 minutes, stirring often.
Add tuna and Parmesan cheese to saucepan. Simmer for 2 minutes, stirring occasionally.
Stir in spinach and cooked pasta. Cook for 2 minutes or until heated through. Serve immediately.
Interesting Facts
This dish was featured in the movie "The Godfather" and is an Italian-American classic.
This dish is a great way to use up canned tuna and frozen spinach.
This dish can be served as a main course or as a side dish.