For a start you should be having breakfast as it kick starts your metabolism. If you can't manage it first thing, then have something abit later. I take it you weighed your cheese? And you were having a green/ EE day. Where are the fruit and veg? SW is not a licence to eat great mounds of stuff. You should stop eating when you're comfortably full. Missing meals is not good for you and will slow your weightloss down. If you split your food into 3 or even 5 meals then your metabolism will speed up and in the end you'll lose more.
(Oh G*d I sound like a teacher! I don't mean to preach, but one meal a day is not the way to go)