Wesleyan's main eatery is Usdan, which offers a wide array of food including classics (usually some kind of meat-and-potatoes offering with veggies), stir-fry, pizza, "pastabilities," cereal, make-your-own paninis, salads, and vegan and kosher stations (which are surprisingly delicious). If you're not into mainstream dining, the alternative dining hall is called Summerfields, and it's located across campus near the Butterfield dorms. Summerfields has a menu that you order off of—rather than a buffet—and is the place to go for greasy treats and, as of this year, Mexican food! Depending on your hometown's proximity to Mexico, "taqueria" at Summerfields may or may not meet your standards.
In addition to dining halls, the University has Wes Wings (for chicken tenders, burgers, salads, pita, and hummus, or really bomb mac and cheese), WesShop (overpriced but handy mini-grocery store on campus), Pi Café (daytime coffee, baked goods, sandwiches, and salads), the Usdan Café (coffee, sandwiches, and sushi), as well as Star and Crescent, the restaurant inside Alpha Delta, which is usually pretty tasty but hard to get a seat at because it's so small (first three freshmen at dinner eat free, though, which is cool). Students can also cook for themselves if they have a nice kitchen, but that probably doesn't happen until sophomore or junior years, as freshman dorm kitchens tend to be cramped and/or gross.