Carnation Cafe is a Disneyland staple (and a personal must do every trip), but they don't have the Monte Cristo there. You'll have to go to Cafe Orleans or the Blue Bayou for Disneyland's famous Monte Cristo.

Cafe Orleans is a particularly good stop if you are visiting during Halloweentime as they will traditionally have both regular and Pumpkin Mickey Beignets on their menu.

The other two 'famous' Disneyland food stops are Fried Chicken at the Plaza Inn and the Corn Dog from the Red Wagon (both on Main Street USA).

There are a lot of options (and most of them are great), what type of cuisine dining experience are you looking for?