Ruth's Chris Au Gratin Potatoes - 4 medium peeled Russet potatoes, 1 cup heavy cream, 1/2 cup milk, 1-1/2 Tbsp flour, 1 large clove finely-chopped or pressed garlic, 1/2 tsp salt, 1/8 tsp ground black pepper, 1 Tbsp butter, 2 cups grated Cheddar cheese | Food Pusher