Crack the eggs into a bowl, season with salt and pepper, then whisk with a fork.
Heat the oil in a pan over medium heat.
Add the mushrooms and sauté for 3 to 4 minutes, until they release their liquid and start to brown.
Add the bell pepper and spinach, then cook for another 1 to 2 minutes.
Pour the whisked eggs over the vegetables.
Over lower heat, stir continuously until you get a creamy scramble.
If you'd like, finish with a little cheese or green onion.