In a large bowl, combine crab and cream cheese.
Stir in Worcestershire sauce, soy sauce, ginger, lemon juice, and green onion. Season with salt and pepper to taste.
In a small bowl combine cornstarch and water. Add the egg yolk. Set aside, we'll use this to seal up our wontons in a bit.
Fill each wonton wrapped with ~1 teaspoon of filling. Coat the edges of the wonton with the sealing mixture. Then fold over to create a triangle.
Press to seal, and then crimp the edges using a fork.
In a large pot heat oil to 350 degrees F. Fry in batches for 3-4 minutes or until crispy.
Drain on paper towels.