Step 1: Preheat oven to 425°F (220°C). Toss diced zucchini, bell peppers, red onion, and cherry tomatoes with olive oil, salt, pepper, smoked paprika, and oregano.
Step 2: Spread vegetables on a baking sheet and roast for 20–25 minutes, stirring halfway through, until tender.
Step 3: While vegetables roast, bring vegetable broth to a boil. Stir in couscous, cover, and let sit 5 minutes. Fluff with a fork.
Step 4: Combine roasted vegetables and couscous in a large bowl. Drizzle with lemon juice and mix in parsley and mint.
Step 5: Add crumbled feta if desired and adjust seasoning. Serve warm or at room temperature.