Rub olive oil on all sides of the slow cooker. You may also use an oil spray. Distribute the potatoes, onions, jalapeno, and salsa inside the slow cooker.
In a separate bowl, lightly whisk the eggs. Add the mozzarella, salt, and pepper. Pour this mixture into the slow cooker, being sure to cover the potatoes.
Set the slow cooker on low for 4 hours, or until potatoes are tender and the eggs set.
Notes
A smaller baking dish was placed inside the slow cooker for this serving size.