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