Preheat oven to 350°. Lightly grease 9×13 inch baking pan. Place half of bread cubes on bottom of baking pan. Sprinkle with half the ham, then half the cheese; repeat. In large bowl, beat together eggs, milk, salt, hot sauce and green onions. Pour egg mixture into pan. Place pan on top of baking sheet with a rim and place in oven. Pour water into baking sheet and bake for 60 minutes, or until eggs have set.