Place yogurt into a fine mesh strainer over a bowl and let sit for 30 minutes. You will see about 1- 2 teaspoons of water strain from the yogurt. Toss the liquid.
Peel the cucumber. Using the large holes in a box grater, grate the cucumber. Place grated cucumber in a piece of cheese cloth and tightly squeeze all the water of out- as if you were wringing out a towel. Place cucumber and the strained yogurt into a medium sized bowl.
To the yogurt, add in the remaining ingredients up to the olive oil. Using a fork, mix well. Check for seasonings and add more salt if needed. Place into a decorative serving bowl and chill. Just before serving, drizzle about 1-2 tsp of olive oil over the sauce.
Notes
Use cheese cloth to strain out the liquid. This dish is best made the day before so all the elements can blend toggery. Remove as much water as possible.