Follow directions at http://artofthepie.com for basic crust. When rolling out the dough, add 1-2 Tbsp. of grated Parmesan cheese to the flour and roll the crust on both sides to incorporate the Parmesan cheese. Transfer the bottom crust to a deep dish pie plate.
For the filling:
Heat the butter in a large skillet over medium heat. Rough chop the stems and leaves of the ramps and sauté in the butter until soft and wilted. Chop the mushrooms into large pieces and to the skillet and cook until browned, stirring frequently. Season with salt and pepper.
In a medium bowl, whisk together the heavy cream, eggs, and flour. Add the mushroom mixture, herbs, and cheese and stir to combine. Pour the filling into the bottom pie crust. Roll out the top crust on both sides in the Parmesan cheese and flour mixture and place on top of the pie. Pinch the two crusts together and tuck into the dish to seal. Cut slits into the crust to vent. Brush top crust with egg wash.
Bake at 350 degrees F until crust is golden brown and juices are bubbling, about 60-75 minutes. Let the pie cool to room temperature before serving to let the filling thicken.
Keep any leftover pie in the refrigerator. If serving again, reheat the pie at 350 degrees F for 30 minutes.
Recipe by People, Places and Pies at https://peopleplacespies.com/spring-indiana-wild-ramp-morel-mushroom-pie-billings-farm/