I recently made my spaghetti in my crock pot.
1 jar spaghetti sauce, whole wheat noodles, frozen turkey meatballs
I added the sauce first , noodles next (broken in half or more and not cooked) , then the frozen meatballs. I also added onions, peppers (whatever else you would use if making on stovetop). Season to taste.
Put on low to medium and let cook. All the noodles were cooked and not hard everything was just right.