Here in Britain we use ovens to cook most of our food. Most of our food is baked or roasted. I really like the way some ovens are fan assisted. The fan moves the air around so all 3 of the shelves are the same temperature. If I set the cooking heat to 150°c, I know that all three of the shelves will be that temperature because the thermostat is in the top of the oven.
If I turn off the fan assistance, I know only the top shelf will be 150°c, the lower shelves will be a bit cooler; I think some fans in assisted ovens aren't even electric, they have their own sterling engin.
I like to use clay pots with lids, you can put vegetables in the clay pot without any water and they'll get steamed by their own water content; steamed veg tastes delicious with gravy. I recall that you can get about 9 full sized clay pots into an oven, 3 on each shelf. You can also bake pasta in a clay pot if you use pasta bake sauce.
When the oven his reached the target temperature, the flame at the bottom bips down to about the size of the smallest hob flame; you are cooking 9 items on a tiny flame, or dipped heating element if the oven is electric.
