Mix together the gelatin and water. Let it rest for 15 minutes.
Place guacamole, cream cheese and sour cream in a large food processor. Blend until smooth and creamy. Season with salt and pepper.
Microwave the gelatin until melted and fully dissolved. Stir in four tablespoons fo the mousse mixture stirring well, and then add to the remaining mousse. Place in your desired mold and chill for several hours until set.
Place all the remaining ingredients in a blender and blend until creamed and well integrated. Set aside.
To serve, unmold the mousse and drizzle with the dressing.
Garnish with the cashews and serve with your favorite crackers or chips.