Heat oven to 450° F.
In a small bowl, combine tomatoes, onion, garlic, cilantro, basil, oregano, salt and pepper.
Place tuna in a lightly greased baking dish. Brush with butter. Lightly salt and pepper. Spoon tomato mixture over top. Bake for about 15 minutes or until done.
Determine cooking time based upon the thickness of fish—10 minutes per inch of thickness. This recipe will take longer because it is topped with sauce.
Contributed by Joyce Taylor MM2