Combine and pour into unbaked pie shell...
topping:...
Mix topping until crumbly...
Place pie in a large brown paper bag...
Fold and staple shut...
The bag will have an odor as it heats but it will not burn as long as you don't let it touch the sides of the oven...
Bake in a pre-heated 350 degree oven...for 1 hour
and 45 minutes..
Do not peek into the bag till it is done!