PREP TIME: 20 MINS COOK TIME: 1 HRS ADDITIONAL TIME: 15 MINS TOTAL TIME: 1 HRS 35 MINS 2 tbsp unsalted butter 1 tbsp minced garlic 1 tbsp all-purpose flour 1 ½ cups heavy cream 1 cup whole milk 1 ½ tsp kosher salt 2 pounds Yukon Gold potatoes, sliced 1/8-inch thick with peel ½ tsp chopped fresh thyme, more for garnish 1/8 tsp black pepper cooking spray 4 ounces Gruyere cheese, shredded
Preheat oven…