In a small saucepan, combine raisins and rum. Bring to a boil. Remove from the heat; let stand for 30 minutes.
In a large bowl, combine the apples, raisin mixture and vanilla. Combine the brown sugar, flour, lemon zest, cinnamon, salt and nutmeg; sprinkle over fruit and toss lightly.
Line a 9-in. pie plate with bottom crust; trim even with edge of plate. Add filling; dot with butter. Roll out remaining dough to fit top of pie; place over filling. Trim, seal and flute edges. Cut slits in top. Brush milk over pastry; sprinkle with sugar.
Place pie plate on a baking sheet. Bake at 425° for 20 minutes. Reduce heat to 375°; bake 30-40 minutes longer or until crust is golden brown and filling is bubbly. Cool on a wire rack.
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