Did you know that London at one point surfaced its streets with cast iron, and even wood?
The purists who say that they need nothing except a cast iron dutch oven and a good chef's knife may scoff, but I stand firm.
But beware of the kitchen snobs who sniff that they only need three knives and a cast iron dutch oven.
1660s, from cast (past participle adjective) "made by melting and being left to harden in a mold" (1530s), from past participle of cast (v.) in sense "to throw something in a particular way" (c.1300), especially "form metal into a shape by pouring it molten" (1510s). From 1690s as an adjective, cast-iron.