Hi Anna!
Yes - you can use the Disney Dining Plan for the
Fantasmic! Dining Package. Dining at
Mama Melrose's Ristorante Italiano is a 1 Table Service Credit Per Person meal.
To ensure that you have the proper reservation type to include your tickets for the reserved seating section at Fantasmic, I'd recommend that you make your reservation by phone at (407) WDW-DINE and request availability for your desired date that you'll be at Hollywood Studios. The Cast Member will let you know which of the participating dining locations have availability and the times suitable for your party size. Due to this being a 'special event' type of dining offer, you will be required to give a credit card to guarantee your reservation but will then 'pay' using your dining plan at the actual time of the meal.
Only a limited number of these packages are available, and the dining time is generally 'early' in the evening, so you'll want to plan your day accordingly and have an early or very light lunch to save room to enjoy Mama Melrose's delicious & generous dishes!
Following your dinner, your server will present you with your admission ticket to the reserved seating section and advise you on suggested arrival time and location.
Thanks for visiting the Moms Panel - and be sure to return if we can help you additionally with your upcoming Walt Disney World vacation.
Wishing you a Magical time Anna!
Kirsten