You can make tzatziki, a nice "meze" (appetizer-snack) with chopped or grated cucumbers, yogurt, salt, garlic and some olive oil (optional). I am Turkish, our food is almost the same with Greeks, so we have hundreds of stuff made with yogurt.
One other thing you can make is this: take some capsicum/cayenne peppers/paprika bake them in the oven or grill. Let them cool a little, then skin them, slice, mix in some garlic, salt, olive oil, chopped parsley and yogurt. Delicious, I would say. You can make this with aubergines instead of or in addition to cayenne peppers, and it tastes great as well.
We also make a drink with yogurt, very close to buttermilk, not as fatty. Yogurt, water, salt and a whisk is all it takes.
You can make wholemeal pasta, then add some salt, yogurt, dried or fresh mint and garlic(optional) as sauce. Healthy and delicious. Italians find it weird that we eat yogurt with pasta
. We eat yogurt with almost anything.
Another meze: Grate some carrots, add very little olive oil, cook this in a pan until it gets yellowish. Add in yogurt and garlic and salt.
I don't know if you can find celery roots called celeriac in the US, if you can: Skin, wash and grate one average celeriac, mix in some chopped/grated walnuts, add salt yogurt and garlic(optional).
Boil some chicken breast until cooked. Let it cool off. Break the flesh into 2 inch long very thin strings. Mix this with chopped walnuts, salt, yogurt (adding some mayonnaise will do a nice trick) and garlic (aw, garlic in everything i know), top this with some walnut oil and mixed with paprika powder.
I'll add other recipes as I remember. Bon appetite.