Step 1

Preheat the oven to 425 degrees Fahrenheit.

Step 2

Place the cut vegetables and olive oil in a large bowl. Season them with salt and pepper. Toss to coat evenly, then place on a sheet a pan.

Step 3

Roast in the preheated oven for 20 minutes.

Step 4

Meanwhile, pat the salmon dry and season it generously with kosher salt and pepper. Remove the skin if desired.

Step 5

Mix the Dijon, maple syrup, vinegar, garlic, thyme, and cayenne, if using, in a bowl.

Step 6

Remove the vegetables from the oven. Push the vegetables to the edge of the sheet pan, creating spaces for each of the salmon fillets. Brush the dijon and maple syrup mixture over the salmon.

Step 7

Return the sheet tray to the oven and cook for another 12 to 15 minutes for medium-rare salmon (internal temperature of 125 degrees Fahrenheit) and 15 to 18 minutes for medium to well-done salmon (internal temperature of 145 degrees or more).

Step 8

Taste for seasoning, adding more salt and pepper if needed, and serve.