Breakfast Casserole

I found this in a cookbook and I want to try it

It is called
Thistle Inn casserole

3 cups frozen, shredded hash brown potatoes
3/4 cup shredded monterey jack cheese with jalapeno peppers or shredded sharp cheddar chesse
1 cup fully cooked, diced ham or canadian bacon
1 1/4 cup sliced green onion
4 beaten eggs
1 12 oz can evaporated milk
1/4 tsp salt
1/8 tsp pepper
Preheat oven to 350 degrees  Spray a 2 quart square baking dish with nonstick cooking spray
Arrange potatoes evenly in bottom of dish.  Sprinkle with cheese, ham and green onion.  
In a medium mixing bowl, combine eggs, milk pepper and salt.  Pour egg mixture over potato mixture in dish.  (The dish may be covered and refrigerated at this point for several hours or overnight)
Bake uncovered for 40 to 45 min (55 to 60 if made ahead and chilled) or until center appears set.  Let stand 5 minutes before serving.  Garnish with diced fresh tomatoes or salsa.