I have never heard of or seen such an oven... I use a toaster oven for the same thing. I went with a convection oven to avoid any hot spots that may ruin the paint job.
They have a fan that circulates the heat, take out the rack and make soup in it and it stirs itself. It has a 12 qt. glass bowl, fan and heat are in the lid.
Like a New Wave Oven only a glass bowl instead of a plastic dome. Stainless expander rings are extra. For the price I got 3, one in both places for
cooking and that one in the garage.