Guess I miss understood the original question.
To make this a more well balanced diet I would say you need more protein, more veggies, some whole grains, and a bit more fruit.
Do you eat meat? Can you tolerate gluten? I will assume yes to both of these for now.
I would suggest having the yogurt for breakfast, maybe with a slice of whole wheat toast or Ezekial bread.
Lunch maybe a large green salad with some protein (grilled shrimp/fish, HB egg, nuts, grilled chicken/tofu, quinoa, beans, etc), and a piece of fruit for dessert.
Afternoon snack could be the greek yogurt combo again if you are really craving it....or perhaps carrots and hummus, or a few nuts and a piece of cheese.
Dinner ...kind of wide open. If you've had enough protein with the yogurt, cheese, etc, you could do a whole wheat pasta tossed with grilled veggies and a bit of EVOO, or a baked sweet potato and some broccoli. If you want more protein how about grilled fish or sushi and seaweed salad. Or just a nice baked chicken, brown rice and asparagus?
Just some thoughts........P