Set a large pot of water on the stove and heat to a boil
Wash and cut the potatoes in half (or in quarters if they are larger potatoes)
When the water is boiling, add a pinch of salt and the potatoes. Cook until the potatoes are just fork tender - about 5-7 minutes.
Drain the potatoes and run them under cold water for a couple of minutes to stop the cooking. Let them cool slightly while you prepare the rest of the salad
Peel the cucumber and chop it into bite size pieces
Mix 1/4 cup yogurt, 1/4 cup mayonnaise, 2 tsp vinegar, 1/4 tsp thyme, 1/2 tsp salt and 1/4 tsp pepper in a cup or small bowl. Taste and adjust the seasonings as needed
Cut the potatoes into bite size pieces and add about half of the dressing
Mix together and add the cucumbers to the potatoes
If you are not serving it immediately, store the salad and the extra dressing in the refrigerator
When ready to serve, taste the salad and add additional dressing, salt and pepper as needed.
Place in a bowl and serve. It's the perfect summer side dish.