Cook the couscous: Bring vegetable broth to a boil in a medium saucepan. Stir in couscous, cover, and remove from heat. Let sit for 5 minutes, then fluff with a fork until light and fluffy. (For pearl couscous, simmer 8–10 minutes until tender, then drain excess liquid.)
Prepare the dressing: In a small bowl or jar, whisk together olive oil, lemon juice, honey, Dijon mustard, salt, and pepper until emulsified. Taste and adjust seasoning as needed.
Toast the nuts (if using): In a dry skillet over medium heat, toast almonds or pistachios for 2–3 minutes, stirring occasionally, until lightly golden and fragrant. Set aside.
Assemble the salad: In a large mixing bowl, combine couscous, pomegranate seeds, cucumber, red bell pepper, onion, parsley, and mint. Toss gently to mix.
Add cheese & nuts: Fold in crumbled feta and toasted nuts (if using) for creaminess and crunch.
Dress & serve: Drizzle dressing over the salad and toss lightly until everything is evenly coated. Serve immediately or chill in the refrigerator for 30 minutes for the flavors to meld.