Slow Cooker Scalloped Potatoes

"These Slow Cooker Scalloped Potatoes are rich and creamy and smothered in Gruyere and Parmesan cheese. It's the perfect thing to make for a holiday dinner because it frees up space in your oven and on your stove top! Just layer sliced potatoes, chicken broth, milk, onions, Gruyere cheese, butter, Parmesan cheese, and thyme in your slow cooker. Flour is used to thicken the sauce, but you can omit this for a gluten free version."