Pumpkin and Black Bean Soup

2 tablespoon extra-virgin olive oil, 1 turn of the pan
1 medium onion, finely chopped
3 cups canned or packaged vegetable stock
1 can (14 1/2 ounces) diced tomatoes in juice
1 can (15 ounces) black beans, drained
2 cans (15 ounces) pumpkin puree
1 cup heavy cream
1 tablespoon curry powder
1 1/2 teaspoons ground cumin
1/2 teaspoon cayenne pepper
Coarse salt
chives, chopped or snipped, for garnish

Heat a soup pot over medium heat. Add oil. When oil is hot, add onion. Saute onions. Add broth, tomatoes, black beans and pumpkin puree. Stir to combine ingredients and bring soup to a boil. Reduce heat to medium low and stir in cream, curry, cumin, cayenne and salt, to taste. Simmer 5 minutes, adjust seasonings and serve garnished with chopped chives.