Food safety reminder: Follow safe food-handling practices and use a food thermometer to verify safe internal cooking temperatures.
U.S. measurements first, metric equivalents in parentheses. Conversions are approximate; oz means weight ounces, not fluid ounces.
2 filet mignon (6 oz (170 g) each), tied if needed Salt and freshly ground black pepper to taste 1 tbsp (15 ml) neutral oil 2 tbsp (30 ml) unsalted butter 8 oz (225 g) cremini or button mushrooms, very finely chopped 1 small shallot, minced 2 tsp (10 ml) fresh thyme leaves 4 thin slices prosciutto 2 tsp (10 ml) Dijon mustard 1 sheet puff pastry, thawed 1 egg yolk + 1 tsp (5 ml) water (egg wash)
2 filet mignon (6 oz / 170 g each), tied if needed Salt and freshly ground black pepper to taste 1 tbsp neutral oil 2 tbsp unsalted butter 8 oz / 225 g cremini or button mushrooms, very finely chopped 1 small shallot, minced 2 tsp fresh thyme leaves 4 thin slices prosciutto 2 tsp Dijon mustard 1 sheet puff pastry, thawed 1 egg yolk + 1 tsp water (egg wash)
1. Season steaks; sear in hot oil 1–2 minutes per side. Cool, then brush with Dijon; chill 10 minutes. 2. In butter, sauté mushrooms, shallot, and thyme over medium until dry and concentrated, 8–10 minutes. Cool completely (duxelles). 3. On plastic wrap, lay 2 prosciutto slices overlapping. Spread half the duxelles; place a steak on top. Roll tightly; twist ends to secure. Repeat; chill 15 minutes. 4. Cut puff pastry in two squares. Unwrap each steak; place on pastry and wrap, sealing edges. Brush with egg wash; chill 10 minutes. Heat oven to 400°F/200°C. 5. Score tops lightly; bake 18–22 minutes to golden and 125–130°F internal for medium-rare. Rest 10 minutes before serving.
Per serving | Servings: 2
Nutrition estimated: November 5, 2026
*Values are estimates based on USDA data and mathematical calculations. Actual values may vary. Where data are unavailable, those contributions are excluded. Calories, Carbohydrates, Protein, Fat, Saturated fat, Cholesterol, Fiber, Sodium, Potassium, Calcium, Iron, Vitamin A and Vitamin C are known subtotals. Missing contributions are unknown, not zero.