A TIP FOR CRUSTLESS QUICHE
You can freeze your crustless quiche either whole or in slices. Leave it in the fridge overnight to defrost. It can then be served either cold or hot; reheat in the oven, covered loosely with foil until heated through.
Preheat the oven to 350˚F. Oil a 10-inch round pie plate with 2 tsp. olive oil.
Squeeze the cooked spinach dry between the palms of your hands and finely chop.
Heat the olive oil in a large skillet over medium heat, add the scallions, and sauté, for 3-4 minutes until softened. Remove from the heat.
Whisk together the eggs and whites, cream, salt, and pepper to taste, the nutmeg, Mastiha powder, and cayenne in a large bowl. Stir in the cheese, spinach, and scallions. Pour the mixture into the pan and bake, uncovered, for 35-40 minutes until golden and set. Serve hot or at room temperature.