Hi Nicole,
This is really a tough question to answer. One, because Epcot has so many fantastic restaurants and two because people's opinions on food can vary so greatly. That being said, I'll share a few of my favorites with you.
Le Cellier Steakhouse is my absolute favorite restaurant in all of Disney. The filet mignon with white truffle and herb butter sauce is so tender you almost cut it with a fork.
There are 2 wonderful restaurants in the Italy Pavilion:
Tutto Italia Ristorante has delicious Italian food and
Via Napoli features some of the best wood fired pizza I've ever tasted.
At
Teppan Edo the chefs cook your dinner in front of you on a grill. The atmosphere is fun and the food is great.
La Hacienda de San Angel is the new Mexican restaurant and it features delicious selections.
Hope this helps and that you have a wonderful vacation. Be sure to call 407-WDW-DINE as soon as possible (up to 180 days prior to your arrival) to make your Advanced Dining Reservations.
Kaylene