Get out all of your ingredients and get them measured and ready to go!
Slice your potatoes to between ⅛ and ¼ inch thick. Rinse and set aside.
Preheat your oven to 425 degrees.
Melt butter in large pot over medium heat.
Add onion and cook until tender, stirring occasionally, about 5 minutes.
Add garlic, thyme, salt, and pepper. Stir.
Add potatoes, chicken broth and cream.
Cover, reduce heat to medium-low, and simmer until potatoes are almost tender, about 10 minutes.