This pesto meatball orzo soup is a cozy, flavorful recipe that features tender mini meatballs, orzo pasta, shredded carrots, celery, and spinach in a light, creamy broth brightened with pesto. It’s a comforting dish inspired by a popular restaurant’s Italian wedding soup.
Italian Wedding Soup originated as a Neapolitan peasant dish called minestra maritata (married soup). The name stems not from marriage ceremonies, but from the flavor-melding "marriage" of green vegetables and rich, savory meats simmering together in a slow-cooked broth.
The Origins in Naples
The history of minestra maritata traces back centuries in the Campania region of Italy.
Peasant Origins: It began as a way for the working class to use up whatever ingredients they had on hand. This usually meant bitter greens (like escarole, borage, or kale) and leftover or tough cuts of pork.
Seasonal Ritual: In Italy, it was often historically tied to the winter pig slaughter, where the off-cuts of meat were boiled alongside greens.
The Metaphor: The "marriage" referred to the perfect, flavorful balance of the robust, fatty pork (representing the husband) and the delicate bitterness of the leafy greens (the wife)
Evolution in America
When Italian immigrants settled in the United States in the late 19th and early 20th centuries, they adapted the recipe to local ingredients.
The First Mention: The earliest known print mention of "Wedding Soup" in the United States appeared in a 1925 Los Angeles Times article.
New Additions: Tough scraps of meat and large chunks of pork were largely replaced by bite-sized meatballs made of beef, pork, and sometimes sausage.
Pastina: Small pasta varieties like orzo, acini di pepe, or pastina were incorporated to make the dish heartier.
The Pesto Twist
Adding pesto to Italian Wedding Soup is a modern Italian-American innovation. Because classic "married soup" relies heavily on the marriage of herbs, garlic, and greens with meat, stirred-in basil pesto naturally amplifies those exact foundational flavor profiles. Pesto introduces the rich, aromatic notes of fresh basil, garlic, pine nuts, and Parmesan that complement both the tiny meatballs and the savory chicken broth. 
For meatballs, add beef, pork, Parmesan cheese, egg, breadcrumbs, milk, onion, salt, pepper, garlic, parsley, and lemon zest to a large bowl. Mix just until combined—don’t overwork. Form into small meatballs (thumb size) and set aside.
For soup, heat olive oil in a large pot over medium heat. Add onion, celery, and carrot, and cook until softened, 5 to 7 minutes. Stir in garlic and cook for 30 seconds.
Add chicken bone broth, black pepper, basil, Italian seasoning, and red pepper flakes. Add the mini meatballs. Bring to a simmer and cook for 10 to 15 minutes.
Add spinach; stir until wilted. Reduce heat to medium-low, and stir in half-and-half. Heat gently, until hot but do not boil.
Turn heat to low; stir in pesto, Parmesan and lemon juice. Season to taste with salt.Servings 8
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.