I would just like to know how to prepare a good, thorough cooked omlette?

I like 2- egg omelettes with ham and onions. Fry the onions first in a bit of olive oil, then add the ham, and then whisk eggs together and add to the pan. Then add some herbs. I don't add salt, besides the ham adds that. I usually turn the omelette in the pan, but it breaks up. Maybe put it under the grill, then you get it caramellised on both sides which is really nice. Also, add cheese before putting it under the grill, then it's lovely and melty. Happy eating! :D