Step 1

Preheat oven to 350 degrees and grease a 9x13 pan with cooking spray.

Step 2

In a large bowl whisk together eggs, milk, salt, and pepper. Set aside.

Step 3

In another VERY large bowl, mix together frozen potatoes (break up any clumps), ham, and the three cheeses.

Step 4

Pour egg mixture over potato mixture and stir to combine.

Step 5

Pour mixture into prepared pan.

Step 6

Bake, uncovered, for about 1 hour - 1 hour 15 minutes, or until bubbling and the eggs have set and the potatoes are tender.

Step 7

Remove from oven and let rest for about 5-10 minutes.

Step 8

Top with cilantro and green onions, if desired, serve and enjoy!