Makes a lot. https://www.ahealthysliceoflife.com/slow-cooker-baked-ziti/
Brown the ground beef. Add the garlic and cook together for 3-4 minutes until meat is cooked through and onions are tender.
Transfer meat and onions to a slow cooker. Add one jar of sauce, water, Italian seasoning, garlic powder, and pasta. Mix well.
Add the ricotta and a half cup of the shredded mozzarella, mix until combined. Top with the remaining jar of marinara and sprinkle the remaining half cup of shredded mozzarella over the top.
Set on low for 3 1/2 hours (on the IDO, you can set to manual 190 degrees). Serve right from the slow cooker; enjoy!