Prepare couscous to package directions. Pre heat the grill to medium high (400-450 degrees.) If cooking over an open flame, place a grill grate over the fire.
Place a large piece of tin foil on a work surface. Drizzle some olive oil on the bottom.
For each salmon slice, layer on the following (remember to divide all ingredients into four portions): 1/2 cup cooked couscous, one slice salmon, yellow summer squash, zucchini, tomato, onion, sun-dried tomatoes, olives, lemon slices, garlic, sprinkle with salt and pepper & parsley. Drizzle some broth and a little more oil over the top. Fold the foil edges over the salmon making a packet. Leave a little room in the packet for air to circulate.
Place the wrapped salmon over the grill or open flame and cook for 10 to 12 minutes. Cooking time depends on the thickness of the salmon and your desired level of doneness. You can test salmon while it's cooking by opening up the foil, but be careful of the steam! Using a sharp knife peek into the thickest part of the baked salmon. It's almost done when it's beginning to flake, but still has a little translucency in the middle. Once your salmon flakes easily with a fork, it’s done. If you like it a bit more on the rare side take it off the grill at the very slightly translucent phase and let it rest off the grill for a few minutes before serving.
You can also bake this in the oven! Simply follow all of the prep work and preheat the oven to 375˚F. Place the wrapped salmon on a baking sheet. Bake for 15-20 minutes or until the salmon is done to your liking. See Step 4 for how to judge doneness.
This salmon can also be enjoyed the day after you cook it. Simply reheat in a lightly oiled skillet or in the microwave.