The Something to Do Stew is a song from a Season 4 episode "Something To Do Blue". It is sung by Mr. Salt and Mrs. Pepper.
Mrs. Pepper: Just go on down to the kitchen of life.
Mr. Salt: And pick out a favor or two.
Mrs. Pepper: Then you stir it up, stir it up, stir it up tasty.
Mr. Salt: If you want to get something new.
Both: Because they're all ingredients in the something to do... stew.