Season the salmon fillets with salt, pepper and garlic powder on both sides.
Heat a large skillet on medium heat, then drizzle in about 1 tbsp olive oil. Sear the salmon on medium/high heat for about 2-3 minutes per side, until browned. They don't need to be fully cooked through. If you prefer to fully cook the salmon and then prepare the couscous on its own, cook the salmon for 4-6 minutes per side depending on thickness, then set aside and follow the remaining steps except for step 5.
Remove the salmon from the pan and add another tbsp of oil. Add in the diced shallots and cook on medium heat for 1-2 minutes to soften.
Add in the pearled couscous, spices and chopped herbs and toss together for 1 minute. Add in the chickpeas and water and give everything a stir
Nestle the salmon fillets back into the pan.
Cover the pan and bring to a boil. Once boiling, reduce the heat to low and simmer for about 20-25 minutes until all of the liquid is absorbed. Once ready, let the pan rest for 5 minutes off of the heat.
While that cooks, prepare the herb sauce by blending together the herbs, olive oil, lemon juice, vinegar and pinch of salt in a blender or small food processor. You can also use an immersion blender for this step.
Once the salmon and couscous are ready, serve with the herb sauce.