There's an idea.
Make sure it's an ENAMELED cast iron oven, though.
Tomatoes need to go in a non-reactive pan, because they're so acid. Otherwise, you'll wind up with iron-flavored tomato sauce and a pan that needs to be re-seasoned.
An enameled steel broiler pan would work too - probably better, since the tomatoes would be in a shallower layer.
Speed comes from what you put behind you. - Judi Ketteler
I'd do it in my non-enameled pans, because they've been cooked in so much on very hot fires that there is nothing but patina on them.
The iron goes into your bloos, and that's a good thing!
Karen
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insidious ungovernable cardboard