Peel and pit the avocados, then coarsely mash them in a bowl with a fork. Mix in the lime juice, blending well. Add the other ingredients one at a time, blending well after each addition, in the order given. Garnish with sour cream and sprinkle a little cilantro on top. May be served at room temperature or chilled. Makes about 5.25 cups of dip. SUGGESTED DIPPERS: Warm Tortilla Chips, Baby Corn, Black Olives, Jicama, Mushrooms