Toss apricots with sugar, flour, cinnamon, salt and allspice; mix well.
Turn mixture into pastry-lined 9-inch pie plate. Dot with butter.
Roll out and cut remaining pastry into 3/4-inch side strips. Weave over filling into lattice top. Tuck in edges, seal and flute.
Microwave on high 10 to 12 minutes or until filling begins to bubble; rotate one-quarter turn after 5 minutes. Bake at 400°F 15 to 20 minutes or until top is golden.
Mix powdered sugar and lemon juice until smooth. Brush top of pie with mixture.