Heat olive oil in a medium skillet over medium heat. Add garlic and saute until fragrant, about 30 seconds.
Add baby bella mushrooms and saute until slightly softened, about 2-4 minutes.
Whisk together eggs, milk of choice, and ground black pepper in a separate bowl. Pour mixture into skillet and cook for about 2-3 minutes or until eggs are cooked through, stirring frequently.
Fold in spinach and feta cheese, continuing to stir, until spinach is wilted and feta is melted, about 2-3 minutes. Serve immediately.
Notes
This recipe is the perfect way to use up any leftover veggies in your fridge. Feel free to play around with it and add different veggies of your choosing!