One’s heart’s desire; a piece is parcel fulfillment; total fulfillment is the whole pie
Mince Pie A blessing derived from having gone through many trials
Pie 1. A measure of domestic bliss, contentment (note condition or contents of pie). 2. To have a slightly negative sense of one’s hopes and dreams, deem them impossible to achieve (as in “pie in the sky”). 3. Entitlement (as in “a piece of the pie”).