Saute mushrooms in a large skillet until tender and water has released, about 6-8 minutes. Set aside.
Place spinach in same skillet and add about 2 tablespoons of water.
Cook spinach on medium heat just until wilted, about 2-4 minutes.
Bring mushrooms back to skillet and add salt and pepper.
Create 4 wells in the middle of the vegetables by pushing them to the side.
Crack an egg in each well.
Season the eggs with salt and pepper.
Cook until the eggs are fully set or to your preference, roughly 5-6 minutes.