
Few cuts of beef feel as luxurious as a perfectly seared filet mignon, and this version delivers that steakhouse experience right in your own kitchen. A screaming-hot cast iron skillet builds a deep, caramelized crust on the outside while a quick oven finish keeps the center buttery and tender. The real star is the herb butter — softened ghee whipped together with fresh parsley, thyme, rosemary, garlic, and a hint of lemon zest — which melts in a golden pool over the rested steak just before serving. Because ghee replaces dairy butter, this fits neatly into a paleo approach without sacrificing any of the richness you'd expect from a classic preparation. Many store-bought compound butters and restaurant sauces sneak in ginger or other warming spices, so making your own herb butter from scratch means you know exactly what's going into every bite. The ingredient list is short, the technique is straightforward, and the result is genuinely impressive — the kind of dinner that feels like a special occasion even on a Tuesday.
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Preheat the oven to 425°F (220°C). Remove the steaks from the refrigerator 20–30 minutes before cooking and pat them completely dry with paper towels. Season all sides evenly with the kosher salt and black pepper.
In a small bowl, combine the softened ghee, parsley, thyme, rosemary, garlic, flaky sea salt, and lemon zest, if using. Stir until evenly mixed, then set aside at room temperature.
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