How do I substitute out canned pumpkin pie filling

I have a recipe for a pumpkin french toast bake (think pumpkin bread pudding) that calls for 30oz. canned pumpkin pie filing. I have all of the ingredients for making a pumpkin pie from scratch, including canned pumpkin. How do I doctor the canned pumpkin in order to substitute for the pie filling?

I figure that I'll need to add spices and sugar, but I'm unsure if there is any egg or dairy products in the pie filling that I'd need to account for.