The Perfect steak and mashed potatoes RestaurantQuality

Ingredients

• 2 (8-10 oz) steaks (approx. 225-280g each), ribeye or New York strip, about 1-inch thick (2.5cm)
• 1 tablespoon (15ml) olive oil
• 1 tablespoon (15g) unsalted butter
• 2 cloves garlic, minced
• 1 sprig fresh rosemary (or 1/2 teaspoon dried)
• Kosher salt and freshly ground black pepper, to taste
• 1.5 lbs (approx. 680g) Yukon Gold potatoes, peeled and quartered
• 1/2 cup (120ml) heavy cream
• 4 tablespoons (57g) unsalted butter, cut into pieces
• 1/4 cup (60ml) milk
• Kosher salt and freshly ground white pepper, to taste
• Optional: 2 tablespoons (30g) sour cream or cream cheese for extra tang and richness