Pasqualina or Spinach Pie | Real California Milk

Ingredients

• Pastry dough for 2 9-in. deep dish pies
• 2 tbsp. olive oil
• 2 10-oz. boxes frozen chopped spinach, thawed and squeezed of excess liquid
• 1 onion, finely diced
• 6 tbsp. Real California butter
• 6 tbsp. all-purpose flour, or more as needed, plus more for the work surface
• 1/8 tsp. ground nutmeg
• 1 cup plus 1 tbsp. Real California milk, divided, or more as needed
• 6 large eggs
• Salt and pepper