Final answer:
The correct option is (d). Duchesse potatoes are made from mashed potatoes blended with egg yolks and seasoning, piped into shapes, and baked until golden.
Step-by-step explanation:
The classic dish made from mashed or pureed potatoes blended with eggs and seasoned is known as duchesse potatoes.
This dish involves combining mashed potatoes with egg yolks, seasoning with salt, pepper, and sometimes nutmeg, then piping the mixture into attractive shapes and baking until golden. The result is a creamy and flavorful side dish often used in fine dining to accompany main courses.