Steps
1. Heat olive oil in a non-stick pan over medium heat.
2. Add sliced mushrooms and sauté for 3-4 minutes until tender.
3. Add spinach to the pan and cook until wilted, about 2 minutes. Season with salt and pepper.
4. In a bowl, beat the eggs with a pinch of salt and pepper.
5. Pour the eggs evenly into the pan over the vegetables.
6. Sprinkle shredded cheese on top and cook until the eggs are mostly set, about 3-4 minutes.
7. Carefully fold the omelette in half and cook for another 1-2 minutes until cheese melts.
8. Slide the omelette onto a plate and serve warm.