On a pot, over medium heat, add two teaspoons of vegetable oil then add the sliced onion, black pepper seeds and garlic gloves. Saute for 2 minutes.
Add the mushrooms and broccoli. Stir for 2 extra minutes then add the vegetable stock. Simmer for 10-15 minutes until broccoli is tender then remove from heat.
Blend the vegetables until smooth, add the cream and put back on heat for extra 2-3 minutes, add salt to taste and serve.