Hearty Corn and Pumpkin Soup

Name: Hearty Corn and Pumpkin Soup
Ingredients: 1/3 cup olive oil; 2 leeks, white and light green parts only, thinly sliced; 2 carrots, peeled and diced; 9 cups chicken broth; 5 small red potatoes, diced; 1.5 teaspoons salt; 0.25 teaspoon ground cloves; ground black pepper to taste; 2 (16 ounce) cans pumpkin puree; 1 (16 ounce) package frozen whole-kernel corn; 0.5 cup whole milk; 1 tablespoon minced fresh parsley, or to taste