Due to the horrendous costs of bendalloy and cadmium, and the fact that they are both rare metals, frivolous usage like restaurant cooking is highly unlikely (not to mention the high burn speed of bendalloy). Theoretically, that would make cooking so much less hassle (and so much more fun), but the costings outweigh the benefits in that situation (unless you are ridiculously wealthy (Scrooge McDuck level) and can afford the stuff). I do like the way you think, though.
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If I could choose a single Mistborn power, I'd choose to be a Subsumer. For the simple reason that I eat way too much and it would be a simple solution. I guess if I was Twinborn, I'd choose to be a Tineye Subsumer. Because I feel that that would be amazing when eating food.