Preheat the oven to 425°F.
In a large bowl, stir together the diced apples, white sugar, brown sugar, cinnamon and flour.
Divide the mixture among the muffin tins. Top or each pie with a woven lattice or cut-out shapes.
Brush the tops of the pies with the egg wash then sprinkle them with sanding sugar (optional).
Bake the pies until they are golden brown, 16 to 18 minutes.
Remove the pies from the oven and let them cool completely in the muffin tin.
Using a sharp knife, run it around the edges of each pie to help release them then serve.
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