In a small bowl or liquid measuring cup, whisk together the garlic, oregano, mustard, vinegar, salt and pepper. Still whisking, slowly add the olive oil to make an emulsion.

Check the cooking time for the couscous per the instructions on the package. Depending upon the couscous you have chosen, time will vary by a few minutes 5-10.

Bring the water in a saucepan to boil. Once boiling, add the couscous, unsalted butter and a pinch of salt (optional). Stir once to incorporate. Remove from the heat, cover, and let sit for 5 minutes (again, check the instructions on the package, as different couscous will have different sit times).

After resting time, fluff the couscous with a fork.

While the couscous is cooking, mix the dressing (see instructions below), dice and slice each of the four ingredients: feta (dice), cucumber (dice), olives (slice/quarter), and tomatoes (quarter).

To combine: add salad ingredients (see video), and finish with dressing - add less than you think you will need. Toss salad and taste. If you need more dressing, add. I usually do not need all of the dressing I have made and reserve it for salads throughout the week.

Place salad in the refrigerator for one hour. Then serve and enjoy!