noun
assorted dish; pudding
A dish made by combining various ingredients, often steamed or set, similar to a pudding or terrine. The term is somewhat old-fashioned and may appear in traditional or regional cooking contexts.
祖母は寄せ物を作るのが得意で、特に卵と野菜の寄せ物が美味しかった。
My grandmother was good at making assorted steamed dishes, especially the egg and vegetable one.
この料理本には、魚介の寄せ物のレシピが載っている。
This cookbook has a recipe for a seafood pudding-like dish.
Compound of 寄せ (yose, 'gathering, collecting') + 物 (mono, 'thing'). The term literally means 'gathered things', referring to a dish made by combining various ingredients.