Green Vegetable Soup with Miso

Name: Green Vegetable Soup with Miso
Ingredients: 3 cups vegetable broth or water, plus more as needed; 1 bunch curly or lacinato (dinosaur) kale, stemmed and roughly chopped; 1 bunch (or most of a bunch) parsley, leaves only; 1 head/bunch broccoli florets, cut or broken into 2-inch pieces; 1 large carrot, coarsely grated; 1 bunch (or most of a bunch) scallions, chopped; 2 large garlic cloves, roughly chopped; 1/4 cup (4 tablespoons) white miso, or to taste; Juice of half a lemon, or to taste; Salt and freshly ground black pepper to taste