Potato Gnocchi Gratinèed with Fontina Cheese

Name: Potato Gnocchi Gratinèed with Fontina Cheese
Yield: Serves 4 to 6 as a main course
Cuisine: Italian
Ingredients: 5 tablespoons, unsalted butter; 2 pounds, russet potatoes (other baking potato), washed; 1 1/4 cups, unbleached all-purpose flour, plus more as needed; 1 teaspoon, table salt, plus more for cooking liquid; 4 ounces, fontina cheese, shredded