Line the empty pie shell with parchment and fill the pie with beads. Par bake in the preheated oven for 15 minutes.
Remove the pie shell from the oven. Carefully remove the parchment and pie beads. Poke fork holes into the bottom of the pie shell and return to the oven for another 5-7 minutes.
Combine the eggs, milk, salt, and pepper in a large bowl with a spout for easy pouring.
Add in the spinach and feta, being careful not to overfill.
Bake in the oven for 45-60 minutes, until center is almost set.
Remove from the oven and cool for 15 minutes before serving, or cool completely to serve later.
Notes
Keyword blood sugar friendly, easy, low carb, no sugar added