Debbie’s Classic Macaroni and Cheese
2 teaspoons plus 1/2 teaspoon kosher salt* 8 ounces small elbow macaroni 5 tablespoons salted butter, plus more for baking dish 2 cups coarse bread crumbs (homemade or Panko) 2 ounces Parmigiano-Reggiano or Pecorino Romano cheese, finely grated (about 1…