Step 1

Crust: Pulse flour and salt in a food processor until combined. Add butter and pulse until mixture resembles coarse meal. Whisk together egg yolk and 2 tablespoons ice water. Add to flour mixture and pulse until moist crumbs start to form (no longer). Transfer mixture to a piece of plastic wrap, and using wrap and your hands, form into a disk. Refrigerate, wrapped, at least 30 minutes and up to 4 hours.

Step 2

On a lightly floured work surface, roll out dough to an 11-inch round. Transfer to a 9-inch pie plate; trim edges to a 1-inch overhang. Tuck overhang under and crimp as desired. (To create arc pattern, press a spoon into dough.) Wrap in plastic; freeze at least 30 minutes and up to 3 days.

Step 3

Preheat oven to 400 degrees. Line crust with parchment and fill with dried beans or pie weights. Bake until dough underneath parchment is dry, 25 minutes; remove parchment and beans. Bake until golden, 8 to 10 minutes more. Let cool slightly.

Step 4

Filling: Reduce oven temperature to 375 degrees. Whisk eggs until smooth, then whisk in cream, milk, 1 1/2 teaspoons salt, and 1/2 teaspoon pepper. Stir in half of bacon and cheese. Pour custard mixture into crust, stopping just short of the top; be careful not to overfill. Press spinach into custard, leaving some poking out from top.

Step 5

Sprinkle with remaining bacon and cheese. Bake 10 minutes at 375 degrees, then about 55 minutes at 325 degrees. Let cool about 1 hour before serving.