Preheat oven to 350℉. Spray a 12 slot muffin tray with oil.
In a large skillet, heat the olive oil on medium. Sauté your scallions for 1 minute and sauté your spinach until just wilted, stirring constantly (about 1 minute). Transfer to a plate and set aside.
In a large bowl, add in your eggs, olive oil, buttermilk and whisk together until combined. Next, add in the flour, baking powder, salt, nutmeg and mix until incorporated. Lastly, fold in the spinach mixture, dill, feta and mozzarella. Using a large scooper, transfer the mixture to the muffin tray. Sprinkle tops with grated parmesan. Bake for 23-25 minutes or until toothpick comes out clean. Let them set in the pan and then transfer muffins to a wire rack.