When I bought Penny she came with an alcohol stove and with a microwave beneath. No oven at all. Thing is I have not had a microwave in any of my apartments since 2009 when I left university. Even at university I only remember the majority of my use of the microwave being to thaw meat. I honestly have not at all missed having a microwave. I do not even notice going without, but I did surely feel not having an oven on the boat.
My apartment had a toaster oven that my mother had given me. I took some measurements on the boat and determined that though it would fit width and depth it did not fit height. I brought it aboard anyways figuring I could figure out how to use it. It fit nicely above the stove as you can see in the following picture. Top to bottom is: toaster oven, alcohol stove, microwave.
Two owners before me Penny was owned by a retired couple that lived aboard her. That couple did extensive renovations and part of those renovations were to the existing stove/oven setup. That owner had done a pretty good and clever job about crafting the new parts so I figured the stove had a simple way to remove, though I did not find it on quick inspection. Closer inspection however revealed that after lifting the stove top top open the alcohol burners for lighting they could be picked up. Nestled on either side under there were screws holding the stove to the sides. It was trivial to remove the four screws holding in the stove and relocate the whole thing up a couple inches to to accommodate the toaster oven.
Now Penny has full baking abilities. Thus far I have baked several batches of cookies and a couple pans of nachos. The toaster oven is working great and has the added benefit of a timer that shuts off the oven. Simply set it to the desired time and if I walk away or forget about it the oven shuts itself off and no burned or overcooked food! BOOM!
Tragically the microwave that was there is no longer with Penny. It was a cool old microwave from Sears. From back in the day when products were built to last. I strangely miss it though I never used it nor had any inclination to use it. I think the old Sear nostalgia hit. I am however enjoying taking advantage of my new oven!