Preheat oven to 375°F. Place pie crust in 9-inch pie dish, double-fold edges, and crimp.
Layer crumbled bacon and cheeses in bottom of crust.
In medium bowl, gently whisk eggs, milk, salt, pepper, and nutmeg until just combined.
Slowly pour egg mixture over bacon and cheese.
Place pie dish on preheated baking sheet.
Bake at 375°F for 20 minutes, then reduce temperature to 350°F.
Continue baking 25-30 minutes until center is slightly wobbly and edges are set.
Let rest 10 minutes before slicing.