Step 1

Trim crusts from bread; reserve crusts. Cover bottom of greased 13 x 9-inch (33 x 23 cm) baking dish with slices of bread, trimming to fit if necessary. Cover with ham, then cheese. Top with another layer of bread.

Step 2

Whisk eggs. Add onion, green pepper, dry mustard, pepper, Worcestershire sauce and Tabasco; whisk to combine. Whisk in milk. Pour mixture over bread. Cover and refrigerate overnight.

Step 3

Meanwhile, pulse reserved crusts in food processor until coarsely chopped. Set aside 1-1/2 cups of the bread crumbs. (Remainder can be frozen for another use.)

Step 4

The next day, stir butter into bread crumbs until moistened. Sprinkle buttered crumbs over top of casserole.

Step 5

Bake in a preheated 350 degrees F (180 degrees F) oven until puffed, set and golden brown, about 1 to 1-1/4 hours.