Topsiders breakfast is a buffet, with all of your typical buffet items:
scrambled eggs
hash browns (pattie form)
bacon
sausage
biscuits & gravy
omlets made to order (if you want to stand in a usually long line waiting for them)
Waffles
Assorted fruits
Assorted breads
Bagels, cream cheese, lox
How long it takes is really up to you - the buffet line at Topsiders usually moved fairly quickly (there are actually 2 lines). The omlet line could be pretty slow unless you get there early.