Peel potatoes and slice into small pieces. Place them in a medium sauce pan and cover them until just covered with water. Cook over medium-low heat for 20 minutes, or until cooked through and tender
Drain potatoes and mash in a large mixing bowl. Add in sugar, eggs, evaporated milk and vanilla and mix well. Pour mixture into a baking dish.
Preheat oven to 350 F
In a separate bowl, combine the ingredients for casserole topping and spoon mixture over mashed sweet potatoes
Bake for 35-40 minutes and allow to mostly cool before spooning into egg roll wrappers
Heat deep fryer to 350 F
Place a spoonful of casserole onto the end of an egg roll wrapper and roll according to package instructions
Cook egg rolls for 3 1/2 minutes in deep fryer and transfer to a wire rack over paper towels to drain grease. While still hot, toss in cinnamon sugar mixture for a light coating