3. Step-by-Step Cooking Instructions & Crisping Secrets
Now, let’s talk about the cooking process! To achieve that perfect golden crust, it’s essential to preheat the oven to 400°F (200°C).
I also recommend using an instant-read thermometer to ensure the crust is cooked through.
For the air fryer option, simply cook the pie at 375°F (190°C) for 10-12 minutes, shaking halfway through for a crispy crust.

Save Cooking Steps
Step-by-Step Culinary Timeline
1. Preheat the oven to 400°F (200°C). Line the baking dish with parchment paper.
2. Roll out the puff pastry to a thickness of 1/8 inch. Place the prosciutto slices on one half of the pastry, leaving a 1/2 inch border around the edges.
3. In a small bowl, whisk together the eggs, mustard, and thyme. Brush the egg mixture over the prosciutto, then sprinkle with the cheddar and Parmesan cheese.
4. Fold the other half of the pastry over the filling, pressing the edges to seal. Use a knife to create a decorative border.
5. Place the pie on a baking sheet lined with parchment paper and bake for 20 minutes, or until the crust is golden brown.
6. Let the pie rest for 5 minutes before slicing and serving.
Meal-Prep Storage & Crispy Air-Fryer Reheating Guide
• Cool Before Sealing: Let cooked portions cool for 10 minutes before sealing in glass containers so steam never softens the crust (keeps 4 days in the fridge).
• Sauce on the Side: Store dips, drizzles, and fresh herbs separately until right before serving.
• 3-Minute Crispy Reheat: Reheat in a 380°F (193°C) air fryer or dry cast-iron skillet for 3–4 minutes to restore shatteringly crisp edges.
Continue to Part 4 for the official printable MyTastyTips Recipe & Macros Card plus reader FAQs!