There are no meal plans of any sort, but here is what I did for my trip:
I budgeted 100-150 per day for food for a family of 3. I overbudgeted.
here is an example of a day of meals for us: (You can also read my trip report with pricing of meals.
Breakfast: Continental at the hotel $20
Lunch at Louie's at Universal $22
Snacks which include: water, churros, icecream $15
Dinner at Hard Rock Cafe $50
You could easily share dishes at Hard Rock or somewhere like Thunder Falls terrace. We each bought a dish here and spent about $30, but the portions were huge. It easily could have been a $20 lunch if we would of shared.
Hope this helps. Let me know if you have any other questions.