Potato-Fennel Gratin | Publix Super Markets

Ingredients

• 3 tablespoons unsalted butter, divided
• 1 shallot, finely chopped
• 3 cloves garlic, finely chopped
• 1 teaspoon fresh thyme leaves
• 1 cup heavy cream
• 1 teaspoon kosher salt, divided
• 1/2 teaspoon cracked black pepper
• 2 lb gold potatoes, thinly sliced
• 1 small fennel bulb, thinly sliced
• 1/2 cup imported Parmesan cheese, finely grated
• Nonstick aluminum foil