Pit, peel, and mash the avocado with a fork. Blend in the lemon juice, blending well and then add the sour cream, blending well. Mix in all the rest of the ingredients, blending well. Cover and chill. Makes about 1 1/4 cups of dip. SUGGESTED DIPPERS: Green Bell Pepper, Bok Choy, Celery, Pita Bread, Radishes, Aged Cheddar Cheese, Cheese Crackers