Colcannon Soup (Potato Kale Soup)

Bahan-bahan (4 porsi)

• 1 tablespoon butter
• 2 large leeks, thinly sliced (white and light green parts only)
• 6 cloves garlic, minced
• fine sea salt and freshly-ground black pepper
• 4 cups vegetable broth
• 2 pounds Yukon gold potatoes, diced
• 2 bay leaves
• 1/2 cup heavy cream
• 8 ounces shredded sharp white cheddar cheese
• 3 ounces (a medium-sized bunch) fresh kale, stemmed and finely chopped
• toppings: thinly-sliced scallions and extra shredded cheddar