2 strips lemon zest, plus 1 tablespoon grated, divided
1 bay leaf
3 tablespoons chopped fresh parsley
12 ounces whole-wheat fettuccine, or linguine
1Heat 1½ teaspoons oil in a large nonstick skillet over medium-high heat. Add tuna and saute until browned on the outside but still pink inside, about 2 minutes. Remove from the pan, season with salt and pepper and set aside.
2Reduce heat to medium and add the remaining 1½ teaspoons oil to the pan. Add onions, carrots, celery and 3 teaspoons of the chopped garlic. Saute until the vegetables are softened, about 3 minutes. Add tomatoes and mash with the back of a spoon or a potato masher. Add broth, wine, thyme, strips of lemon zest and bay leaf; bring to a boil over medium-high heat. Cook until slightly thickened, about 15 minutes.
3Return the tuna to the sauce, reduce heat to low and simmer, stirring occasionally, until the fish is opaque in the center, about 5 minutes more. Discard strips of lemon zest and bay leaf. Taste and adjust seasonings.
4Meanwhile, combine parsley, grated lemon zest and the remaining 1 teaspoon chopped garlic in a small bowl; set aside.
5Cook pasta in a large pot of boiling salted water until just tender, 8 to 10 minutes or according to package directions. Drain and place on individual plates. Spoon the tuna sauce over the top. Sprinkle with the parsley mixture and serve.