We will prepare the products that we will need. I cooked from half of these ingredients. Pepper must be narrow and long, such as I have in the photo yellow is still not very suitable. Wash everything, peel pepper, onion and garlic.
Cut the onion into thin rings and quarter the tomatoes.
Add sour cream, fresh thyme leaves and garlic to the feta. Mix thoroughly.
Fill the peppers tightly with the resulting mass, for this it is convenient to use a kefir spoon (so long and narrow) and cut off the tips of the pepper. Add the olives to the tomatoes and onions.
Carefully cut the filled peppers with a sharp knife and place them on top. ((In the end, I decided not to add yellow pepper, since it was still too large for this dish, and I filled another narrow green pepper. )
Pour the salad appetizer with oil, add fresh rosemary leaves to taste (if you do not like it, you can not add it) and gently mix.