The most space saving and useful cooking equipment I’ve found over the years are :
A convection toaster oven with a rotisserie.
This broils, bakes with wonderful results.
The toaster function leaves a bit to be desired though. It bakes perfect pizza with a pizza crisper, broils steak and fish terrific.
And roasts a whole chicken, pork or beef roast, with a little trick. Add 20 mins per pound of meat or poltury.. Preheat the oven to 450f, cook meat for 15 mins. Then turn oven down to the suggested cooking temp for which you’re cooking and let cook the remainder of the time left. A meat thermometer is a good idea for safety and to cook beef the doneness you prefer.
1 cup Keurig coffee pot.
I thought I’d never give up my 10 cup coffee pot. But I did in favor of the Keurig. Not that it saved much more space, but the ease. No more filters or coffee containers does save a bit of space. But the ease and efficiency to get my morning cup is a hands down winner. And if you keep your eyes open you can get some really great deals on your favorite flavor of coffee. Mine for example is good ole Columbian. I found a deal at Wegmans whether its on sale or not. $27 per 72 cup case. On sale its $25.
Burton gas burner
The safest gas cooker yet in my opinion and huge space saver. It comes in a sturdy plastic case. I keep the stove, velcroed to my cabinet top as well as the Keurig. I use the plastic case to store the extra cans of butane fuel.
I don’t use this as much as I use to but it still comes in handy and doubles as a panini maker, maybe not the perfect panini but works for me.
2 Cup Electric Food Chopper/Grinder
If I’m chopping alot of veggies this is a huge time saver. And great for grinding fresh herbs and nuts. I also make dips with this.
Not just for smoothies. I use this to make mock mashed potatoes from cauliflower. And anything that requires blending. I make a lot of smoothies too.
Even if you don’t have an APU (generator), you can run the engine in your vehicle for the short time you’d be using these appliances. And of course you’ll need an inverter. Mine is a 2500 watt and runs my small frig/freezer while using these.