A savory spinach and feta quiche delivers a vegetarian, high protein brunch option packed with fresh greens and tangy cheese. This elegant dish is wonderful for family brunches or meal prep.
Preheat oven to 375°F. Place the pie crust in a 9-inch pie dish and gently press it into place. Prick the bottom with a fork.
Heat olive oil in a skillet over medium heat. Add diced onion and sauté for 3–4 minutes until translucent, then add spinach and cook until wilted, stirring frequently. Remove from heat and let cool slightly.
In a large bowl, whisk eggs, milk, salt, pepper, and nutmeg until thoroughly combined for a creamy filling.
Spread the cooked spinach and onions evenly over the pie crust, then sprinkle with crumbled feta cheese to ensure even texture and flavor in every slice.
Pour the egg mixture over the spinach and feta. Gently tap the dish to remove air bubbles and create a smooth layer.
Bake on the center rack for 35–40 minutes, or until the quiche is just set with a slight jiggle in the middle. Rest for 10 minutes before slicing to prevent crumbling.