Let potatoes soak up creamy mushroom and garlic flavors, then sprinkle with Parmesan to add a flavorful snap.
Rinsing the sliced potatoes in water made acid with cream of tartar helps keep them firm during long, slow cooking.
Use two large rubber bands to keep the slow cooker’s lid in place during transit. Hook one rubber band around the lid’s knob and one handle; hook the second rubber band around the lid’s knob and the other handle.
To turn this side dish into an entree for 6, add 2 cups cubed ham to the slow cooker with the potatoes.
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