A great supper or buffet dish, this South African pie is derived from a popular dish called bobotie—a mixture of ground beef and seasonings, with sweet and sour elements. Bobotie is a mainstay of the Cape Malay cooking of Cape Town and may be made with beef, lamb, or fish. This version comes from my friend Kyra Effren, who grew up in Stellenbosh, outside Cape Town, and made this once for a party at her home in Dallas. The pastry crust is my ad