Cook sausage and bacon. Set aside.
Sauté the onion. Set aside.
Combine the eggs, seasoning salt, pepper and milk. Mix to combine.
In a 9x13 inch pan, layer the potatoes, sausage, bacon, onion, green chilies, and cheese. Pour the egg/milk mixture over the top.
Bake uncovered at 350° F for 40-50 minutes. Serve immediately. Garnish with green onions.