yummy au gratin and a new tip — Les Petites Gourmettes

Ingredients

• 2 pounds peeled and thinly sliced Yukon Gold potatoes
• 2 tablespoons unsalted butter, plus more for buttering the dish
• 2 garlic cloves, peeled and minced
• 2 ½ cups half & half
• ½ teaspoon salt
• 2 tablespoons whole-grain Dijon mustard
• 1 tablespoon fresh thyme leaves
• Freshly ground black pepper
• 2½ cups grated Gouda cheese