31.   Add cheese and season with salt.

32.   Add cheese and toss gently.

33.   Add cheese and toss.

34.   Add cheese, a handful at a time, stirring until cheese is melted before adding more.

35.   Add cheese, toss again and serve at once.

36.   Add cheeses and cook until melted.

37.   Add remaining cheese, then remove from heat and stir.

38.   Add the cheeses, beating them in with a wooden spoon until they become a delectable stringy mess.

39.   Dr. Johnson advised heating the milk for the sauce before adding the cheese.

40.   Finally, add the cheese and when it is incorporated and the spinach is hot, serve to four or more guests.