Butter or cooking spray, for greasing
1 cup milk
1/4 teaspoon sea salt, optional
2 ounces prosciutto, cut into strips
2 ounces provolone, shredded
4 day-old croissants, cut or torn into 1/2-inch pieces
The bread pudding will fall, like a souffle, a few minutes after you take it from the oven, so bring it to the table promptly.