Hey Rachael!
Minnie's Holiday Dine at Hollywood & Vine is a character meal. During the meal special guests Mickey, Minnie, Donald, Daisy & Goofy will greet guests who are enjoying a delicious buffet meal. This special character meal is only available November 7, 2015 through January 3, 2016.
In your My Disney Experience account it will state specifically if you have reservations for this dining experience. If not, it will simply say the name of the restaurant. It appears, from a cursory look at the reservation options, this meal is only offered at 4:30 p.m. and 5:00 p.m. the week surrounding your reservation.
I hope this helps with your planning. if you have any more questions about Disney dining options or any other aspect of your Walt Disney World vacation please come back and see me.
Wishing you a
*MAGICAL* vacation and a pixie-dusted day!
Sue N., IN