Grease a small casserole dish (1 ½ quarts) ⅔ full with sliced pears sprinkling cinnamon to taste. I do not usually add any sugar to the pears, since the topping/crust is quite sweet and that makes the dish sweet enough.
Topping
Cream butter and brown sugar. Add the flour and ginger and rub to a crumbly mixture. Sprinkle mixture over the pears.
Bake at 350 °F for about 40 minutes or until pears are bubbly. Serve plain or with ice cream.