Low Carb Cauliflower Leek Soup

Name: Low Carb Cauliflower Leek Soup
Prep time: 15 min
Cook time: 1 h
Total time: 1 h 15 min
Cuisine: American
Ingredients: 3 tablespoons butter; 2 tablespoons olive oil; 3 leeks, cut into 1 inch pieces; 1 large head cauliflower, chopped; 3 cloves garlic, finely chopped; 8 cups vegetable broth; salt and freshly ground black pepper to taste; 1 cup heavy cream