Scalloped Potatoes

INGREDIENTS

• 2 tablespoons unsalted butter
• 1 small onion, minced
• 2 garlic cloves, minced
• 3 cups heavy cream
• 1 cup whole milk
• 4 sprigs fresh thyme
• 2 bay leaves
• 2 teaspoons salt
• ½ teaspoon ground black pepper
• 4 pounds russet potatoes, peeled and cut into 1/8-inch-thick slices
• 1 cup shredded cheddar cheese (about 4 ounces)