Before You Begin
Prepare your slow cooker and ingredients as needed. Cooking times and results may vary depending on your equipment and ingredients.
In a skillet over medium heat, cook ground beef and onion until the beef is fully browned and reaches an internal temperature of 160°F (71°C). Drain excess fat.
Add garlic, oregano, basil, salt, and black pepper. Cook for about 1 minute until fragrant.
Transfer the beef mixture to the slow cooker. Stir in broth and crushed tomatoes.
Add broken lasagna noodles, pressing gently so they are fully submerged in the liquid.
Cover and cook on LOW for 4–6 hours or HIGH for 2–3 hours, until noodles are softened. Stir once during cooking if possible.
Stir in ricotta cheese until fully blended and smooth with no visible lumps.
Serve warm, topped with mozzarella, Parmesan, and fresh basil if desired.