If you have an electric grill on your oven, turn it on set to max before you go any further.
Make an ordinary omelette mix by beating a couple of eggs and a splash of milk together with a fork.
Melt a generous nob of butter in an omelette or small frying pan on a medium-high heat, then add and fry a teaspoon or so of curry powder mix in the butter for 30 seconds or so before you add the egg mix (Tikka Masalla works well; the pan wants to be hot, but not TOO hot at this point, or the spices will burn rather than fry, and the result will be pretty disgusting).
Add the egg mix, and use the back of the fork or a spatula to move and spread it around enough so that most of the mix gets exposed to the heat and sets, and the bottom of the pan is covered reasonably evenly.
Once the mix is reasonably solid, take it off the ring and nuke it immediately under the hot grill until the top is also set (as David Roberts correctly points out, you get a fluffier, better-cooked omelette that way - although the spices in the mix tend to reduce the rise).
Take from under the heat, cover generously with a strong, tasty Cheddar (sliced or grated), and shove back under the grill until the cheese is melted.
Turn out folded in the traditional "half-moon" shape, and serve immediately. One of the fastest cooked snacks known to man, and downright delicious.