Mix cream cheese, crabmeat, water chestnuts, onions and soy sauce.
Place 1 teaspoon crabmeat mixture on each wonton wrapper.
Brush top corner of each wonton wrapper with egg. Fold bottom corner of wonton wrapper over filling to opposite corner, forming a triangle. Brush right corner of triangle with egg. Bring right with left corner together below filling, pinch corners to seal. (Repeat.)
Cover wontons with damp cloth.
Heat oil (1 1/2 inches) in 3 quart pot to 350 degrees. Cook (8) turning 2 or 3 times for 3 minutes, drain.
Serve with hot mustard or sweet and sour sauce. Enjoy!