You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

[Q]: Category: FLY ME TO THE MOONS 
Clue: Saturn's largest moon was fittingly named this, also a term for a Greek mythological giant god
[A]: titan


[Q]: Category: NONFICTION 
Clue: This 1988 bestseller was subtitled "From the Big Bang to Black Holes"
[A]: a brief history of time


[Q]: Category: COOKING 
Clue: Diced ham & vegetables often go into a frittata, an Italian type of this egg dish
[A]:
omelet