I think most halogen ovens will be right on the limit or over for a 6A supply. I changed to a Remoska a couple of years back and it is great. Not so fast as a halogen but it uses about 470W and I find it is a lot more versatile and robust. Downside is you will probably have to take out a bank loan to buy one unless you can find one on somewhere like fleabay or similar.
------------- 'A sure cure for sea-sickness is to sit under a tree'
Another vote for Amazon and the Andrew James halogen oven. I did my research at the time and learned a few things. Note that in some models inc. the Aldi one you cannot change the element once it blows. Once it blows, you have to buy a new oven. But in this one you can change it easily and they throw in a spare element for free, as well as lots of cooking accessories & cookbook.
I've had it for nearly a year now and use it at home many times a week. It has yet to go camping with me but I wouldn't hesitate to take it next time I'm on EHU and the 7 litre size makes it just big enough for 2-3 people yet isn't too big to take with you, unlike the bigger 12 litre model I mistakenly bought first from Aldi, it was enormous!
------------- My OH is convinced that a permanent raincloud follows my tent where ever it is pitched. Apparently, I could end all drought and famine in Africa simply by pitching my tent there!
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.