Heat olive oil in a skillet over medium heat. Add ground beef and cook until browned, about 5-7 minutes. Drain excess fat.
Add minced garlic, dried basil, oregano, salt, and black pepper to the beef. Stir to combine and cook for 1 more minute.
Pour marinara sauce into the skillet with the beef mixture and simmer for 5 minutes.
In the slow cooker, spread a thin layer of the meat sauce, then layer no-boil lasagna noodles, ricotta cheese, mozzarella cheese, and Parmesan cheese. Repeat layers ending with cheese on top.
Cover and cook on low for 4 hours or until noodles are tender and cheese is melted and bubbly.
Let lasagna rest for 10 minutes before serving. Enjoy warm.