Step 1

Heat oil in a large pot over medium-high heat. Add onion, carrot, celery, green beans and garlic. Cook, stirring frequently, until the vegetables begin to soften, about 10 minutes. Add broth and bring to a boil. Reduce heat to a simmer and cook, stirring occasionally, until the vegetables are soft, about 10 minutes more.

Step 2

Add white beans, kale, zucchini, tomatoes, vinegar, salt and pepper. Increase heat to return to a simmer; cook until the zucchini and kale have softened, about 10 minutes. Top each serving of soup with 1 teaspoon pesto.