Bring a large pot of salted water to a boil over high heat. Add the band noodles and cook, stirring often to prevent the pasta from sticking together, for about 9 – 11 minutes, until tender but still firm to the bite. Drain, reserving 2 tablespoons of the pasta water.
In a large sauté pan over medium heat, stir the butter and the reserved cooking water until the butter melts. Add the pasta with tarragon and toss to coat. Season the fettuccine to taste with salt and pepper.
Using a two-pronged carving fork, swirl some of the pasta around the fork. Slide the pasta off the fork and mound it in the center of a plate.