Preheat the grill for the salmon.
Boil 2 cups water on the stove and bring to a boil for the orzo. Cook orzo until just done (al dente), about 12 minutes, then rinse with cold water and drain.
Placing a strainer over a bowl, toss cucumber, tomatoes, olives and 1/2 tsp salt and let drain for 20 minutes (It's tempting to skip this step, but don't! You don't want a lot of extra liquid in your salad.)
Toss orzo with the 1/4 cup oil, 1/3 cup dill, garlic, salt and pepper.
Coat salmon with 1 tbsp oil, and salt and pepper.
Grill salmon skin-side up for 4 minutes. Turn and continue to grill about 3 minutes more until barely done. The salmon should be translucent in the center.
Cool salmon for a bit, then add to the orzo mixture. It should flake easily and integrate into the salad.
Optional: Mix crumbled feta into the salad.
Serve room temp or chill in the refrigerator if you prefer a cold salad.