Dining plan or not, you can always substitute anything at Disney World. If we couldn't do that, my husband would never eat at a table service place.
When you look at any Disney menu, look at EVERYTHING. This dish comes with vegetables which you hate (using my husband's example) but they have fries since they have a kids menu? Change to fries. This shrimp scampi comes with rice which you hate (using my example) but another dish has a baked potato? Change it. Don't like a sauce that is mentioned? Ask for the food to be served "naked".
With a husband who asks for his salad to be served without tomatoes, onions, cucumbers, and any other kind of vegetable ever known to man AND to ask for extra dressing, you can do whatever you want.
It's Disney World. Ask.