Preheat oven to 350° and butter preferred baking dish.
Peel and core the pears. Slice into smaller pieces
Place cut pears in a bowl and toss with the vanilla extract.
add ¼ c brown sugar, 2 Tbsp flour, 1 tsp cinnamon, nutmeg and ginger to the bowl with pears in it. Toss to coat pears well.
Place pears into baking dish.
In a bowl combine the butter, remaining ½ cup brown sugar, the remaining ½ cup flour, & remaining 1 tsp cinamon, salt and oatmeal together.
Use your hands if you need to in order for the butter to be incorporated well with the other ingredients.
Spread mixture over the pears in the baking dish and bake for 35-45 minutes, or until pears are very tender, and the top has browned. Be sure to check pears for tenderness and increase cook time by a few minutes at a time.