If you can not find pearl (Israeli) couscous, substitute with a regular couscous, small pasta shape such as orzo or cooked grains like quinoa, wheat berries and barley. (inspiredtaste.net)
This looks great, and I bet it would also work well with other small pasta shapes like isreali couscous, or orzo shapes! (vegkitchen.com)
I am using gluten - free quinoa pasta shells but any small pasta shape will work. (foodbyjonister.com)