First, welcome here (I'm not sure I've read another of your posts here yet).
I'm not too familiar myself with medication-induced weight gain (I guess you could call it this way?) but if the doctor says that nothing remains that would prevent you from losing the weight, technicalkly speaking, any healthy meal plan could probably work. On the other hand, I'm not sure of what your former condition was, so here's to hope I'm not mistaken.
If you don't like counting calories, maybe Weight Watchers or a similar system could work? As far as I know, what you need to count with that system is 'points' (e.g. 1 apple = 1 point, etc.), up to a total of... depends on your current weight. I have some of the documents for the program, but they're all in French, and I haven't even read them all yet *a-hem* so it's a little hard to tell precisely. However, the gist of it is that points system. (You can do it without going to WW meetings, by the way.)
Another 'plan' that could work would be Sugar Busters/plans related to watching your glycemic index, since usually they don't demand you to count plenty of calories.
It also depends, I'd say, on your own 'personality' regarding all of this. Some people need a plan that will tell them exactly what to eat on a given day, some prefer to have much flexibility... so you need to take that into account as well. Anyway, if you're not sure, maybe you could also check the various WW, SB, Atkins... sections of the 3FC forums. I'm sure that nobody there would mind answering a few more precise questions if need be.
And whatever you decide on in the end, I hope it will go well for you, and 'work as intended'.