In a small bowl, mix the Cheddar cheese and 1/2 the cream cheese with an electric mixer until well blended.
Mix in the green onions, red bell peppers, garlic and Worcestershire sauce. Chill in the refrigerator 30 minutes.
In a small bowl, mix the blue cheese, milk and remaining cream cheese with the electric mixer until well blended.
Shape the chilled Cheddar cheese mixture into an 8 inch log.
Spread the blue cheese mixture evenly over the top and sides of the log. Cover with pistachio nuts. Chill in the refrigerator 2 to 3 hours before serving.