1/2 pie pastry
2/3 c. raisins
1/3 c. molasses
1/4 tsp. baking soda
3/4 c. sifted flour
1/2 tsp. cinnamon
1/2 tsp. nutmeg
1/4 tsp. ginger
4 tbsp. unsalted butter
1/3 c. light brown sugar, packed

For topping, combine flour, cinnamon, nutmeg, ginger, butter and brown sugar. Prepare pastry and roll thinly out on lightly floured board. Line 8 inch shallow pan.