Zucchini Fresh Oregano Soup

Bahan-bahan (6 porsi)

• 2 tablespoons unsalted butter
• 1 tablespoon extra virgin olive oil
• 1 medium yellow onion, (finely chopped)
• 1¾ pounds zucchini, (sliced)
• 3½ cups chicken or vegetable broth
• 2 tablespoons finely chopped fresh oregano ((plus a little more, for garnish))
• ½ teaspoon salt
• ¼ teaspoon freshly ground black pepper
• ½ cup half and half cream