To prepare a tiny pecan tarts recipe, you will first need to prepare the ingredients. Preheat the oven to 375 degrees F (190 degrees C) and grease and flour two 9-inch tart pans. Set aside. Sift the flour, baking powder, sugar, salt and nutmeg into the bowl of an electric mixer fitted with the paddle attachment. Beat on medium speed until the mixture is light and fluffy, about 2 minutes. Gradually add the milk, beating after each addition until just combined. Fold in the vanilla. Bake the tart shells for 12 to 15 minutes, or until they are golden brown. Remove from oven and allow to cool before serving.