Heat olive oil in a large soup pot over medium-high heat.
Add the ground beef, onion, and garlic. Cook until the beef is browned and the onion is tender. Drain any excess fat if necessary.
Stir in the diced tomatoes with their juices, tomato sauce, tomato paste, chicken broth, Italian seasoning, salt, pepper, and uncooked pasta.
Bring the soup to a boil.
Reduce the heat to a gentle simmer and cook for 10–15 minutes, stirring occasionally until the pasta reaches your desired tenderness.
Add water or additional broth if needed to reach your preferred consistency.
For the ultimate Easy Lasagna Soup Recipe, either stir the ricotta, mozzarella, and Parmesan into the soup after it cools slightly or serve the cheeses individually so everyone can customize their bowl.
Garnish with fresh parsley and serve warm.