Cold Zucchini Soup
Saute onion in oil until soft (not brown); add zucchini and saute until soft. Add dill, broth, and vinegar and simmer for ~1 hour.
Remove from heat and blend until mostly but not completely smooth.
Add salt, pepper, lemon juice to taste. Chill.
Serve cold, garnished with a dollop of yogurt and sprigs of fresh herbs.