S.H.
Yes you can.
Just slice it up, then mince it up/chop it up with a knife.
Do not put in blender... it will macerate it too much.
On second thought: maybe you can try put it in a blender.. but be sure not to blend it up too much... because you still want it to be "chunky"... not blended nor turn into liquid.
Use the "chop" setting on your blender... something that will chop it roughly. Chunky.