... Put all of it together then place in fridge or should I go ahead and bake it then warm it up when I need it?
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I have done it both ways with success but it is best warm from the oven - so usually bake while eating dinner so it comes from oven to table.
I would bake and reheat. Apples and pears can oxidize and turn brown.
A trick borrowed from applesauce cake (only crazier).
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