Aged Rib Eye with Onion Purée

Ingredients for Aged Rib Eye with Onion Purée

• 6 tablespoons unsalted butter, divided

• 2 medium Vidalia or Maui onions (about 575g total), very thinly sliced on a mandoline (about 3 packed cups)

• 60ml low-salt chicken stock

• 1 tablespoon buttermilk

• Kosher salt

• 1 tablespoon vegetable oil

• 30g dry-aged rib-eye steak (about 2" thick), standing at room temperature for 1 hour

• Coarse sea salt

• Assorted soft herb sprigs (such as tarragon, flat-leaf parsley, and chervil)

How to make Aged Rib Eye with Onion Purée

Heat 2 tablespoons butter in a 12" heavy skillet over medium-low heat. Add onions and cook, stirring constantly, until translucent (do not brown), 10-12 minutes. Add stock and 180ml water. Bring to a simmer, reduce heat to low, cover, and continue to simmer until onions are falling apart, about 20 minutes. Uncover and stir until onions are almost dry (do not brown), about 5 minutes. Transfer onions to a blender. Add buttermilk and 1 tablespoon water. Purée until smooth. Season with kosher salt.

Preheat oven to 177°C. Arrange a wire rack inside a rimmed baking sheet. Melt 2 tablespoons butter with oil in a large cast-iron skillet or large heavy skillet over medium-high heat. Season steak generously with kosher salt. Cook until a deep brown crust forms, 3-4 minutes per side and 1-2 minutes on edges. Place on prepared rack. Roast until a thermometer inserted into steak registers 46°C, about 40 minutes. (Steak will carry over to medium-rare.) Let rest for 30 minutes.

Melt remaining 2 tablespoons butter in a large skillet over medium-high heat; cook until butter browns, about 2 minutes. Add steak and cook for 30 seconds per side, allowing steak to absorb butter. Cut steak into 4 slices. Place 1 steak slice on each plate and sprinkle with sea salt. Spoon warm onion purée alongside. Scatter herbs over purée.

Disclaimer

While every effort has been made to ensure the information is accurate and up to date, individual needs may vary and dietary requirements can differ based on personal health conditions. Always check food labels and allergen information before preparing or consuming any recipe. If you have specific health concerns, allergies, intolerances, or are following a medically prescribed diet, seek advice from your GP, pharmacist, or a registered dietitian before making significant changes to your diet or lifestyle.