Preheat and prep: Heat your oven to 425°F (220°C). Line a baking sheet with parchment or foil for easy cleanup.
Season the veggies: Toss broccoli, zucchini, and bell pepper with 1 tablespoon olive oil, 1/2 teaspoon salt, and 1/4 teaspoon pepper.
Spread in a single layer on the baking sheet.
Start roasting the vegetables: Roast for 10 minutes to give them a head start so they turn tender and slightly caramelized.
Season the salmon: Pat the fillets dry. Rub with 2 tablespoons olive oil, salt, pepper, garlic powder, smoked paprika, lemon zest, and lemon juice.
Add salmon to the pan: Pull the baking sheet out, push the veggies to the sides, and place salmon fillets in the center, skin-side down if using.
Roast to perfection: Return to the oven and bake 8–12 minutes, depending on thickness. The salmon should flake easily and look slightly translucent in the center.
For a crisp top, broil for the last 1–2 minutes.
Make the sauce: While salmon cooks, stir together Greek yogurt, dill, Dijon, lemon juice, salt, and pepper until smooth.
Finish and serve: Plate salmon with roasted veggies. Spoon on the herby yogurt sauce and add lemon wedges and fresh herbs. Taste and adjust salt as needed.