In a large stock pot brown ground beef. Remove grease.
Return beef to pot and add Ragu, broth,tomatoes and noodles. Bring to a boil.
Reduce heat to simmer, put lid on and let simmer for 25 minutes.
After 20 minutes stir in 1/2 cup parmesan cheese.
Pour soup into bowls and stir in ricotta cheese.
Top with parmesan cheese.
Notes
I used Traditional Ragu Sauce but any variety will work. You need to use the ready for oven lasagna noodles if you get regular lasagna noodles they won't cook in time.