A delicious cold summer soup, adapted from Barbara Hansen's "Cooking California Style" cookbook.
Blend or puree the avocado and lemon juice. Then add the milk and yogurt and blend again until creamy. Add the jalapeno, garlic, onion, and cilantro and continue blending. Then add the stock and puree until the mixture is an even consistency. Taste the soup first, then add the salt, adjusting to taste. Serve chilled.