Name: Au Gratin Potatoes
Ingredients: 3 Tbsp. plus 1 tsp. unsalted butter, divided; 2 large shallots, thinly sliced (2 cups); 3 lb. Yukon gold potatoes, peeled and thinly sliced (⅛-inch thick); 1 Tbsp. minced garlic; 2 tsp. finely chopped fresh thyme; 3 Tbsp. all-purpose flour; 2 tsp. kosher salt; ½ tsp. freshly ground black pepper; 1 ½ cups Kitchen Basics® Original Chicken Stock; 1 cup whole milk; 10 oz. gruyere or aged white cheddar cheese, grated, divided (2 ½ cups); 3 Tbsp. finely chopped chives or green onion