"Cream" of Broccoli Soup

2 T olive oil
1 med onion diced
5 c. broccoli
3 c. broth
1/2 tsp ground coriander
1/2 tsp nutmeg
1/2 tsp red wine vinegar
salt and pepper

Saute onion until tender. Add broccoli, broth, and spices. Bring to a boil. Reduce heat and simmer 25-30 min. Cook and puree in blender. Stir in vinegar