Preheat the oven to 425°F. Grease a large rimmed sheet pan with olive oil or non stick spray.
Roast the carrots and cauliflower: Peel and slice the carrots in half lengthwise. If the tops are thicker, quarter them. Cut them into 2-inch sticks. Add them to the sheet pan with the cauliflower. Drizzle with olive oil and season with salt. Toss to coat and spread it in an even layer. Roast in the preheated oven for 20 minutes.
4 medium carrots, 1 head cauliflower, 1 Tablespoons olive oil, 1/2 teaspoon kosher salt
Make the harissa glaze: While the veggies roast, mix together the olive oil, harissa, honey, lemon juice, salt, and garlic in a small bowl. Reserve 2 Tablespoons of the glaze in a small bowl for topping.
2 Tablespoons olive oil, 2 Tablespoons Harissa paste, 1 Tablespoon honey, Juice from 1/2 a lemon, 3 cloves garlic minced, 1/2 teaspoon kosher salt
Add the salmon and chickpeas: Remove the sheet pan from the oven, toss the veggies and push them to 2/3 of the pan in a flat layer. Add the salmon to the other third and spread the harissa glaze evenly over the tops of the salmon with the back of a spoon. Place a lemon slice on top of each piece of salmon.
1 cup chickpeas, 1 1/2 lb skin-on salmon fillets, 1 lemon
Bake again: Bake for another 12-15 minutes, until the salmon easily flakes and the internal temperature is 125-130°F for medium salmon. The vegetables should be deeply golden and charred in some places. (optional- broil everything for the last minute).
Make the yogurt sauce: While the salmon bakes, mix together the yogurt, lemon, garlic, olive oil and salt.
1 cup plain Greek yogurt, Juice from 1 lemon, 1 clove garlic, 1 teaspoon kosher salt, 2 Tablespoons finely chopped parsley and/or dill, Drizzle of olive oil
Serve the veggies and salmon with the yogurt sauce and more lemon juice and fresh herbs if desired.