Step 1: Cook the Meat

1. In a large pot or Dutch oven, over medium heat, add the ground beef or Italian sausage. Cook until browned, breaking it apart with a spoon, about 5-7 minutes.
2. Stir in the chopped onion and minced garlic. Cook until the onion is translucent, about 3-4 minutes.

Step 2: Add the Base Ingredients

1. Add the crushed tomatoes, chicken or vegetable broth, Italian seasoning, and red pepper flakes (if using) to the pot. Stir to combine and bring to a simmer.

Step 3: Add the Noodles

1. Once the soup is simmering, add the broken lasagna noodles. Cook according to the package instructions, usually about 8-10 minutes, until the noodles are tender.

Step 4: Add the Cheeses

1. Once the noodles are cooked, reduce the heat to low. Stir in the ricotta cheese, shredded mozzarella, and grated Parmesan cheese until melted and well combined.
2. Season with salt and pepper to taste.

Step 5: Serve

1. Ladle the soup into bowls and top with additional mozzarella cheese and fresh basil or parsley if desired.
2. Serve hot and enjoy your comforting One-Pot Lasagna Soup!