Best thing I ate: Do you know about this thing called dizi?

“Do you want us to mash it for you?” asks the man behind the counter at Hen House Grill in Irvine when I place an order for dizi. 
“Thanks,” I say, “but I’ll attempt it myself.” 
“You know how to do it?” he asks. 
Dizi, or abgoosht, a classic Iranian stew at the Hen House in Irvine (Photo by Brad A. Johnson, Orange County Register/SCNG)
Dizi, or abgoosht, a classic Iranian stew at the Hen House in Irvine (Photo by Brad A. Johns