Ya, I think it's almost always fried. In Philly, they might just tell you to get back to Maryland if you asked for it. They can be a little weird about food. Brotherly-lovey, yes, but a little weird. Steak sandwich bought on a sidewalk is a better bet there. And a mimosa is another name for the silk tree, and also an alcoholic drink made with champagne and orange juice and served with brunch, which is the usage here. Like a screwdriver, tequila sunrise, gin fizz, or bloody mary, it falls into the "hair of the dog that bit you" school of hangover cures.