20 refrigerated or frozen precooked meatballs (15 to 20 ounces)
2 (14-oz) cans small white beans, drained and rinsed
1 (5- to 6-oz) bag baby spinach, coarsely chopped
1/2 cup finely grated Parmigiano-Reggiano
3/4 teaspoon salt, or to taste
1/4 teaspoon black pepper
Instructions
Heat 2 tablespoons oil in a large Dutch oven. Saute onions, garlic, celery, and carrots until golden, about 4 minutes. Stir in broth and water. Bring to a boil.
Add remaining 2 tablespoons oil to a heavy skillet. Add meatballs and heat until browned, about 3 minutes.
Add meatballs and beans to soup, bring to a simmer. Cook until all vegetables are tender and meatballs are heated through, about 15 minutes.
Stir in spinach, cheese, salt & pepper and simmer just until spinach is wilted, about 1 minute.