Spray the inside of your slow cooker (crock pot) with nonstick cooking spray. Or coat it with a bit of olive oil.
Then add in all of the spaghetti noodles.
Drizzle a couple of tablespoons of olive oil over the noodles and ensure they are all coated (as best as possible).
Then pour in the jarred sauce.
Next, add 4 cups of water.
Give the spaghetti and sauce a gentle stir to coat the spaghetti noodles and to keep them from sticking together.
Now, this next part is completely optional. If you have the ingredients, go for it, if not - no big deal!
Add in minced garlic, Italian seasoning, and basil.
Then top with frozen meatballs. No need to stir these in. Just put them right on top.
Cover and cook on low for about 5 hours.