How long should I bake the pizza in a microwave oven?
Convection simply moves air around to heat evenly. I don't suggest cooking pizza in a microwave oven at all. If you don't want to use a conventional oven I would suggest trying to cook the pizza on a cast iron skillet instead. The secret to pizza is to cook as hot and quickly as possible, both top and bottom. This is more difficult to achieve in a pan, but if you're using store-bought pizza I would try cooking at a lower temperature with a lid on the pan to create a mini oven. If you have a blowtorch you can cook at a high temp and torch the top. Remember that cast iron heats really unevenly, so in either case leave the pan on the stove for a while to heat to temp evenly before you start the cook.