Steps
1. In a bowl, whisk together the eggs, milk, salt, and black pepper until well combined.
2. Heat the olive oil in a non-stick skillet over medium heat.
3. Add the chopped spinach to the skillet and sauté for 2-3 minutes until wilted.
4. Pour the egg mixture over the spinach, tilting the pan to spread it evenly.
5. Cook for about 3-4 minutes or until the edges start to set.
6. Sprinkle the crumbled feta cheese on top.
7. Carefully fold the omelette in half and cook for another 1-2 minutes until fully set.
8. Slide the omelette onto a plate and serve warm.