At around 350-400 calories this meal is fast food at its best. I used to be afraid of omelettes - and even tried various versions, such as soufflé style by whisking the egg whites first. Thankfully my partner knew better than me and he makes a fabulous moist and creamy omelette. Break as many eggs (we used 3 per person) as you are going to use into a bowl, add salt and pepper while whisking. No milk (I used to add milk thinking I had to....not any more). We fried the mushrooms before adding - to get rid of the water. Add some butter/oil to the frying pan, heat through and on a medium to high heat, pour in the eggs and stir around to stop the bottom from burning, when almost set, add the flavourings. We used cooked mushrooms and strong cheddar cheese. The secret is simple - don't overcook. We had some toast with ours.