I was just at Caioti Pizza Cafe about a week ago for a similar reason. I wanted to eat someplace close to Universal Studios that wasn't in Universal CityWalk. For me Caioti fit the bill perfect for a nearby casual lunch before hitting CityWalk.
Caioti Pizza Cafe
4346 Tujunga Ave, Studio City, CA 91604
Ca Del Sole is definitely the best in the vicinity. But there are a few places at Universal City Walk that aren't half-bad ... Daily Grill, Wolfgang Puck Cafe or Karl Strauss ... and you can walk across the plaza from City Walk to the Amphitheater.
NOTE: Except for Ca Del Sole, the locatiojns on the minimap bear no relation to where the orestaurants are located on the Universal property.
Universal Center Dr, Los Angeles, CA 90068
Ca Del Sole
4100 Cahuenga Blvd., North Hollywood, CA 91602
Wolfgang Puck Cafe
1000 Universal Studios Blvd Ste 152, North Hollywood, CA 91608
Karl Strauss Associated Micro Breweries
1000 Universal Studios Blvd, Universal City, CA 91608