Spicy broccoli potato cream soup

2 heads broccoli
1 large white onion
5 medium potatoes
2 c. heavy cream
chicken broth
Tabasco sauce

Bring one liter of water to a boil. Add chicken broth, cleaned and cut broccoli (with stem), diced onion, peeled and cubed potatoes. Cook 45 minutes. Add two ladles heavy cream and a copious amount of black pepper. Add tabasco sauce to taste.