Brown the ground beef. Once the ground beef is almost cooked through, add garlic salt. Continue cooking until beef is no longer pink and drain well. Break the spaghetti noodles in half and place them in a 7-quart crock pot slow cooker.
Next, add the drained groundbeef to the crock pot. Pour ½ cup of water and the pasta sauce on top of the ground beef and uncooked pasta noodles to the crock pot. Stir the pasta around a bit so the sauce sinks to the bottom of the crock pot.
Place the lid on and cook on high for 2 to 3 hours on high or 5 to 6 hours on low. Halfway through, check to see if you need to add additional water and stir. Continue to cook until the pasta is cooked through.