Italian Meatball Soup Rapido

Name: Italian Meatball Soup Rapido
Ingredients: 1 (5 to 6 ounces) bag baby spinach, coarsely chopped; 1 celery rib, halved lengthwise and thinly sliced crosswise; 1 cup frozen chopped onions (about 6 ounces); 1/2 cup finely grated Parmigiano Reggiano; 1/4 cup olive oil; 1/4 teaspoon black pepper; 2 (14 ounce) cans small white beans, drained and rinsed; 2 1/2 cups water; 2 carrots, halved lengthwise and thinly sliced crosswise; 20 refrigerated or frozen precooked meatballs (15 to 20 ounces); 3/4 teaspoon salt, or to taste; 4 garlic cloves, chopped; 5 1/4 cups reduced sodium chicken broth (42 fl ounces)