Crystal wants Convection!
My wife is a good cook, and wants the flexibility of being able to do baked dishes while we travel. And I'm interested by the grill option that is also on this smallest of RV ready combo microwave and convection oven. Dometic DCMC11B.F
But will if fit?
Not really. The space vacated by the original microwave is large enough for the microwave itself to fit, but not the frame kit or the extra air gap around it that is required. But that didn't stop me from trying anyway.
I don't actually recommend anybody try to do this. You'd have to be really desperate to have convection mode, and willing to ignore manufacturer specs and deal with the consequences of that choice. But now I get cookies on the road!