How to Make
Preheat oven to 375 degrees Fahrenheit.
Heat a large (12-inch) cast iron skillet over medium-high heat. When the skillet is hot, add 1 tablespoon of olive oil then add the onion and garlic and cook until softened and fragrant, about 3-5 minutes.
Add the crushed tomatoes, tomato paste, and Italian seasoning, stir to incorporate. Season with salt and pepper. Remove skillet from heat.
Add pasta to the skillet. Toss to coat. Add the drained tuna but do not overly mix. Just gently toss so chunks remain intact and it doesn't turn to shredded tuna where you can't see it at all in the dish.
Sprinkle cheeses on top in an even layer then bake for 25 minutes, or until pasta is cooked through and mixture is bubbly, and cheese is melted. Sprinkle fresh basil on top, serve, and enjoy