Place the cooled pasta in a large bowl with the cucumber, feta, and mint.
In a small dish, whisk together the yogurt, oil, vinegar, sugar, cumin, and a pinch of salt. Taste, and season additionally if desired.
Pour the dressing all over the pasta and veggies. Stir gently to combine and taste; add more salt to the salad if needed.
Garnish with extra mint and the cherry tomatoes. Enjoy!