Boiled Foods
Stewed Foods
Boiled things turn into boiled foods or stewed foods. You can eat anything, if it's boiled long enough.
にもの
The reading is the readings you learned with the kanji.
彼女は小食ですが、煮物ならモリモリ食べます。
She is a light eater but when it comes to stewed foods she eats with gusto.