Absolutely fine, you can add virtually any veg to an omelette, I use mushrooms, you do need to cook them first, lightly fry.
Cottage cheese is low fat and very bland so best had with other stuff, though I'm struggling to think what other than salad.
You seem to be doing very well at making some changes so hopefully that will be reflected in your HbA1C when you next get tested.
Just concentrate on recovery from your stroke, my Mum was not so lucky and passed away from a stroke at age 55 when I was 16.