Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper or foil. Pat salmon fillets dry with paper towels.
In a small bowl, combine olive oil, minced garlic, dried rosemary, dried thyme, lemon zest, salt, and pepper. Stir to create a fragrant herb paste.
Brush the herb mixture generously over each salmon fillet. Place fillets skin-side down on the baking sheet, spaced evenly.
Roast salmon in the oven for 12-15 minutes, until fish flakes easily and reaches 145°F (63°C). A delicious crust will form from the garlic and herbs.
While salmon roasts, bring vegetable broth to a boil in a medium saucepan. Stir in couscous, cover, and remove from heat. Let sit 5 minutes.
Fluff couscous with a fork. Stir in lemon juice and chopped fresh parsley. Season with salt and pepper to taste.
Plate salmon fillets with lemon couscous. Garnish with additional parsley and lemon wedges if desired. Serve warm.