Fat-free "Guacamole"

I LOVE guacamole, but the fat and calories don't love me.

Here's a great tasting alternative:

1.5 pounds asparagus, cut into small pieces
1 tablespoon fat-free Greek-style yogurt
1 tablespoon lime juice
1/4 cup chopped fresh cilantro
3 green onions, thinly sliced
1 tablespoon minced garlic
1 tomato, diced
1/2 teaspoon Worcestershire sauce
salt and ground black pepper to taste

Boil asparagus.  Cool and whirl in blender.  Mix in other ingredients.  Serve with raw vegetables for dipping.