Breakdown of yakiagari ga utsukushii.

Questions & Answers about yakiagari ga utsukushii.
It is read:
やきあがり が うつくしい
- 焼き上がり = やきあがり
- が = が
- 美しい = うつくしい
In normal writing, it would usually appear without spaces:
焼き上がりが美しい。
焼き上がり is a noun in this sentence.
It comes from the verb 焼き上がる, which means something like to finish baking / to be baked and completed.
The -ます stem / noun-like form of that verb is 焼き上がり, and it refers to:
- the finished baked result
- the way something has come out after baking
- the final baked appearance/state
So in this sentence, 焼き上がり is not acting as a verb. It is a noun meaning something like the finished bake, the final baked result, or how it turned out after baking.