This is a good start! A lot of pictorial logo marks have strong silhouettes. Something to think about when tackling a stand alone logo icon; how would this logo icon look solid black or in black is white? Could i recognize this company from just the silhouette alone. I am assuming its a pizza slice on a plate? or maybe a box? playing around and adding more negative space between the grey area and the pizza slice might help your design. Also playing around with the proportion of the pizza slice relative to grey rectangle might help separate the two shapes to make this read better. Maybe dropping the box in the back entirely and adding something relating to San Diego. Happy Designing!