Fennel and Celery Root Soup

Name: Fennel and Celery Root Soup
Ingredients: 5 tablespoons Olive oil; 4 tablespoons butter; 2-3 cloves of garlic diced; 1/2 piece of ginger diced; 4 pieces of celery diced; 1 medium onion diced; 1 large fennel bulb cut into slices; 2 broccoli stems, peeled and diced; 1 large celery root diced; 4-6 cups Chicken or Vegetable Stock; pepper salt to taste; 1/2 teaspoon coriander powder