01 - In a mixing bowl, beat the cream cheese, granulated sugar, egg yolk, vanilla extract, and lemon zest until the mixture is smooth and creamy with no lumps remaining.
02 - Lay an egg roll wrapper flat on your work surface with one corner pointing toward you. Spoon 1 to 2 tablespoons of the cheesecake filling near the corner closest to you.
03 - Fold the bottom corner over the filling, then fold in both side corners toward the center. Roll tightly upward and seal the top edge with a paste made by mixing the flour and water together.
04 - Continue filling, rolling, and sealing the remaining egg roll wrappers until all the filling is used.
05 - Pour vegetable oil into a deep fryer or heavy-bottomed skillet and heat to 350°F.
06 - Carefully lower the egg rolls into the hot oil in small batches. Fry for 2 to 3 minutes, turning occasionally, until all sides are evenly golden brown.
07 - Using a slotted spoon, transfer the fried egg rolls to a plate lined with paper towels to drain any excess oil.
08 - Dust the warm egg rolls generously with powdered sugar and serve alongside fresh berries or drizzle with chocolate or caramel sauce as desired.