In a greased 13 x 9-inch baking dish, spread French bread cubes and drizzle with butter. Sprinkle on cheese and salami.
In a medium bowl beat together eggs, milk, wine, green onions, mustard, pepper and red pepper flakes. Pour over casserole, cover, and refrigerate overnight.
Remove from refrigerator 30 minutes before baking. Preheat oven to 325° F.
Bake, covered, for 1 hour. Uncover, spread sour cream on top, and sprinkle with Parmesan cheese. Bake, uncovered, an additional 10 minutes or until lightly browned.Servings: 10