
Few cuts of beef feel as indulgent as a thick, tender filet mignon, and this version delivers every bit of 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 perfectly rosy and juicy. The real star, though, is the herb butter — softened ghee whipped together with fresh parsley, thyme, rosemary, and a hint of garlic, then melted over the steak right before serving. Because ghee replaces conventional butter and the seasoning stays clean and herb-forward, there are no hidden sugars, sauces, or additives to worry about — just whole, straightforward ingredients that happen to taste extraordinary. Managing fructose intake often means scrutinizing marinades and compound sauces for sneaky sweeteners, but every element here is naturally free of that concern. The optional lemon zest adds a bright lift without tipping the fructose balance, and you can simply leave it out if you prefer to play it safe. This is the kind of meal that feels like a celebration even on a Tuesday night.
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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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