I found myself at a place called La Pizza Loca, at the corner of San Fernando and Fletcher in Glendale, though it appears to be one of a chain.
In addition to the usual toppings (sausage, pepperoni, ham & pineapple among them) they feature chorizo, beans and jalapeno peppers.
Service was less than exemplary -- the young girl at the counter tried to charge me $1 tax on a $3.98 lunch special -- and I didn't have the nerve to try the Mexican toppings. Though they sound interesting, like a flat burrito, perhaps.
Anybody else tried one of these?