In a large stock pot, heat oil over medium heat. Add onion, and cook for 3-4 minutes until soft. Add garlic and cook for 1 minute. Stir in tomato paste and Italian seasoning.
Pour in chicken stock. Add frozen meatballs. Bring to a boil.
Add pasta and cook for 8-10 minutes until pasta is cooked.
Stir in spinach and season to taste.
Serve immediately.
Keyword Easy, Easy Dinners, Italian, One Pot Meals, Pasta, Simmered, Soups, Spinach, Tomatoes