French Potato Gratin | Blue Flame Kitchen

Ingredients

• 2 tbsp salted butter
• 2 cups chopped onions
• 2 cups chicken broth
• 1 cup whipping cream
• 2 tbsp cornstarch
• 1/2 tsp salt
• 1/2 tsp freshly ground pepper
• 1/4 tsp thyme, crumbled
• 1/8 tsp nutmeg
• 10 cups thinly sliced peeled red potatoes
• 2 cups shredded Swiss cheese