Italian Wedding Soup

My kids love a particular brand of canned soup filled with chicken meatballs and soggy pasta, but I prefer real minestra maritata (Italian wedding soup). I make tiny pork meatballs and simmer them with orzo, chickpeas, spinach and parmesan. I occasionally substitute green beans for the spinach, depending on who is at the table.

• 2 quarts homemade chicken stock or low-sodium broth
• 1 large carrot, finely diced
• 1 celery rib, finely diced
• Kosher salt and freshly ground pepper
• 1/4 cup orzo
• 1 pound ground pork
• 1/4 cup freshly grated Parmigiano-Reggiano, plus more for serving
• 1/4 cup dry bread crumbs
• 5 ounces baby spinach, chopped
• One 15-ounce can chickpeas, drained and rinsed