• 42 russet potato, scrubbed and dried
• 21 tbsp olive oil
• 10½ tsp kosher salt
• 5¼ tsp black pepper
• 42 tbsp butter, for serving, optional
• 0.6 l sour cream, for serving, optional
• 21 tbsp chives, chopped, for serving, optional

Metric measurements are approximate conversions.