Preheat the oven. Set it to 400°F (200°C).
Line a large sheet pan with parchment paper for easy cleanup.
Prep the vegetables. Cut everything into similar, bite-size pieces so they roast evenly. Pat them dry to help them caramelize.
Toss the veggies. In a bowl, combine the vegetables with 2 tablespoons olive oil, half the lemon zest, 1/2 teaspoon salt, black pepper, and half the paprika and oregano. Spread them in a single layer on the sheet pan.
Roast the vegetables first. Slide the pan into the oven and roast for 10–12 minutes to give them a head start.
Season the salmon. While the vegetables roast, pat the salmon dry.
Mix 1 tablespoon olive oil, lemon juice, remaining lemon zest, minced garlic, the rest of the paprika and oregano, a pinch of salt and pepper, and the honey if using. Brush or spoon over the salmon.
Add salmon to the pan. Pull the sheet pan from the oven. Push the vegetables to make space and nestle the salmon fillets in the center.
If you like, lay a thin lemon slice on each fillet.
Roast until just done. Return the pan to the oven and bake for 10–12 minutes, depending on thickness. Salmon is done when it flakes easily and looks slightly translucent in the center. For a bit of color on top, switch to broil for the last 1–2 minutes, watching closely.
Finish and serve. Sprinkle with fresh herbs and a pinch of red pepper flakes.
Serve with extra lemon wedges. Taste and add a final pinch of salt if needed.