01 - In a mixing bowl, beat the cream cheese, granulated sugar, egg yolk, vanilla extract, and lemon zest together using an electric mixer or whisk until the mixture is completely smooth and creamy with no lumps remaining.
02 - Lay an egg roll wrapper flat on your work surface with one corner pointing toward you. Place 1 to 2 tablespoons of the cheesecake filling near the corner closest to you.
03 - Fold the bottom corner up and over the filling, then fold in both sides tightly. Continue rolling away from you and seal the top edge with a paste made from the flour and water mixed together.
04 - Continue filling, rolling, and sealing the remaining wrappers until all 12 egg rolls are assembled. Keep the finished rolls covered with a damp towel to prevent drying out.
05 - Pour vegetable oil into a deep fryer or heavy-bottomed skillet to a depth of about 1 1/2 inches. Heat the oil to 350°F over medium-high heat.
06 - Carefully lower the egg rolls into the hot oil in small batches of 3 to 4 at a time. Fry for 2 to 3 minutes, turning occasionally, until all sides are an even golden brown.
07 - Using a slotted spoon, transfer the fried egg rolls to a plate lined with paper towels. Allow them to drain for 1 to 2 minutes to remove excess oil.
08 - Generously dust the warm egg rolls with powdered sugar. Serve immediately alongside fresh berries or drizzle with chocolate or caramel sauce as desired.