Frasier: You know the expression "Living well is the best revenge"?
Niles: Wonderful expression. I just don't know how true it is, you don't see it turning up in a lot of opera plots."Ludwig, maddened by the poisoning of his entire family, wreaked vengeance on Gunther in the third act by living well."
Daphne: It makes me glad we don't have so many guns in England.
Frasier: You don't need guns, you have kidney pie.
Answer: In the last episode, they explained that Tossed Salad and Scrambled Eggs is a metaphor for the mixed-up people to whom Frasier dispenses his radio psychiatric advice.