I use to drive long haul. I primarily farm now but still drive local. We own 3 tractor trailers and 2 Kenworth straight trucks. Anyway...The older trucks you could wrap hotdogs or burgers well anything really (pre cooked) in foil and lay on the exhaust manifold. Ive done soup but you have to poke a hole in the can. Cant do that with newer trucks. They don't get hot enough anymore.
I didn't have that oven you are talking about but I did have a water heater thing for ramen noodles and soups.
Quando omni flunkus moritati-When all else fails, play dead
I'm a man, but I can change, if I have to, I guess.