Pan-Seared Filet Mignon with Herb Butter and Cauliflower Mash Step-by-step instructions

Before you start

Before turning on the heat, gather all the necessary ingredients and equipment to ensure a smooth cooking process. Take the filet mignon steaks out of the refrigerator exactly thirty minutes before cooking to take the chill off, which helps them cook evenly.

Chop the cauliflower into uniform florets, peel the carrots, and trim the woody ends off the asparagus. Measure out the herb butter and set aside the fresh rosemary sprigs so everything is ready for basting and plating.

Instructions

Vegetable Prep and Cauliflower Mash

1. 1Roast the Vegetables
   Preheat the oven to 400°F (200°C). Place the sliced carrots and trimmed asparagus spears onto a baking sheet. Roast the vegetables for 15 to 20 minutes until they are tender and slightly browned.
   Look for tender and slightly browned
   Tip cut carrots uniformly to ensure even roasting
2. 2Prepare the Cauliflower Mash
   Steam the cauliflower florets until completely tender, about 10 minutes. Transfer the hot cauliflower to a food processor and blend until completely smooth and creamy.
   Look for completely smooth and creamy
   Tip drain cauliflower thoroughly to prevent watery mash

At the end of this phase, the roasted carrots and asparagus should be tender with slightly caramelized edges, emitting a sweet, earthy aroma. The mashed cauliflower should be completely smooth, creamy, and free of lumps, holding its shape when spooned.

Keep both the roasted vegetables and the cauliflower mash warm in a low oven while preparing the steak, ensuring everything remains hot and ready for the final plate assembly.

Searing and Herb Butter Basting

3. 3Sear the Filet Mignon
   Pat the filet mignon steaks dry with paper towels. Heat a heavy skillet over high heat. Add the steaks and sear without moving for 2 to 3 minutes until a rich crust forms.
   Look for a deep golden-brown crust
   Tip use a cast-iron skillet for the best sear
4. 4Baste with Herb Butter
   Flip the steaks, then add the herb butter to the skillet. Tilt the pan and continuously spoon the foaming melted butter over the steaks. Cook until the internal temperature reaches 145°F (63°C), then transfer to a plate and rest for 3 minutes.
   Look for butter is foaming and fragrant
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip keep the butter moving to prevent burning

By the end of this phase, the steaks will have a deeply browned, caramelized crust on both sides. The pan butter will be foaming and fragrant with the aromas of the herb blend. When measured with a meat thermometer, the internal temperature of the steaks must register 145°F (63°C) for a safe, perfectly cooked medium-rare finish, followed by a mandatory rest.

Plating and Elegant Presentation

5. 5Assemble and Serve
   Spoon the warm cauliflower mash onto plates and arrange the roasted carrots and asparagus alongside. Place the rested filet mignon steaks on top of the mash, drizzle with the pan juices, and garnish with rosemary sprigs before serving.
   Look for artfully plated and piping hot
   Tip warm the plates beforehand to keep food hot

The final plate presents a beautiful contrast of colors and textures. A generous base of creamy cauliflower mash supports the perfectly sliced, juicy filet mignon. The vibrant roasted carrots and green asparagus spears sit neatly alongside, while a glossy drizzle of the warm herb butter glaze coats the steak. A fresh rosemary sprig completes the dish, offering a wonderful herbal aroma that greets the diner immediately.

Common mistakes

One common mistake is crowding the skillet when searing the steaks, which lowers the pan's temperature and causes the meat to steam rather than sear. Use a sufficiently large pan or cook in batches if necessary.

Another error is basting too early; wait until the steaks are flipped before adding the herb butter, otherwise the butter will burn and taste bitter. Finally, never skip the resting period, as cutting into the steak immediately will cause all the delicious juices to run out.

How to tell it’s done

To determine the perfect doneness, always rely on an instant-read digital food thermometer inserted into the thickest part of the steak. For a safe and delicious medium-rare finish, the internal temperature must reach 145°F (63°C).

Once this temperature is achieved, promptly remove the steaks from the hot skillet and transfer them to a warm plate. Let the meat rest for at least 3 minutes to allow the muscle fibers to relax and the savory juices to redistribute throughout the steak.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest