Orange Pie
["1 c. condensed (not evaporated) milk", "4 eggs, divided", "1/2 c. sour orange pieces", "6 Tbsp. sugar", "1/2 tsp. cream of tartar", "baked pie shell"]
["This is made from sour oranges.", "Mix milk and egg yolks and slowly add sour orange pieces.", "Beat 1 egg white until stiff. Fold into sugar and orange mixture.", "Pour in baked shell."]
["condensed", "eggs", "sour orange", "sugar", "cream of tartar", "pie shell"]