Preposition: of

• race: It must be treated as a potpourri of races and kept within its frontiers.

• information: Ideas, advice and other input A potpourri of information and advice for the buyer or seller of property.

• item: Marks and Spencer A stalwart of the real world, Marks and Spencer's online offering is a veritable potpourri of quality items.

Converse of object

• make: I also have some potpourri made from the dozens of the roses she gave me.