Just put diced potatoes ,par cooked sausages , onion and beef stock in a slow cooker how long should i let it cook ?

Sausage makes everything better Susan

For next time, I wouldn't par cook the sausages and 4-5 hours on high would be adequate. You want all the flavor from the sausages in the dish itself. Depending on how much stock you used, that also could dilute the flavor, so if it was too liquidy, just reduce it next time. Slow cookers create a lot of their own liquid. It sounds really tasty so perfecting that fun recipe would give you a great item for your arsenal of recipes. Splash of red wine or balsamic vinegar would punch the flavor up too. Oooh..so would some Dijon mustard.

It will probably cook about 6 hrs on high. Since the sausage is cooked or mostly cooked you just need the potatoes and onions to get soft and the flavors blend. I would check after a couple of hours to see how it is coming. Make sure the sausage is cooked through also. It will cook faster cut up than whole. Let us know how it turns out.