- Filling:
- 1 tablespoon oil, or as desired
- 1 small onion, chopped
- 5 cups mixed vegetables
- 2 tablespoons lemon juice
- 1 pinch salt
- 4 large eggs
- 3/4 cup crumbled feta cheese
- 1/2 cup milk
- 1/4 cup shredded mozzarella cheese
- salt and ground black pepper to taste
- Crust:
- 1/2 cup cold water
- 1/2 cup corn oil
- 2 1/2 cups all-purpose flour
- Preheat oven to 375 degrees F (190 degrees C).
- Heat oil in a skillet over medium heat; cook and stir onion until golden brown, 10 to 15 minutes. Add vegetables, lemon juice, and 1 pinch salt to onion; stir well. Remove skillet from heat.
- Mix eggs, feta cheese, milk, mozzarella cheese, salt, and pepper together in a separate bowl.
- Mix cold water and corn oil together in a bowl. Place flour and 1 pinch salt in a separate bowl. Slowly pour oil mixture into flour mixture, mixing until a thick dough forms. Press the dough into two 9-inch round baking pans. Spoon the vegetable mixture into the crusts and top with egg mixture.
- Bake in the preheated oven until quiches are set in the middle, about 20 minutes.