Toss sweet potatoes with 1 ½ tablespoons avocado oil and season with salt and pepper. Spread evenly on a rimmed baking sheet.
Place sheet pan on the grill; cook for 10 minutes.
Meanwhile, toss broccolini with remaining oil and season with salt and pepper.
Move sweet potato slices to one side of the sheet pan and place broccolini on the other. Cook for 10 minutes.
Stir together harissa and orange zest. Season salmon with salt and pepper.
Carefully move the sweet potatoes and broccolini to make room for salmon filets. Spread harissa sauce evenly over each piece. Close lid and continue cooking for 10-14 minutes or until salmon flakes easily and internal temperature reaches 145°F.
Notes
I love cooking sheet pan meals on my pellet smoker. The added smoky flavor is really delicious, especially with salmon.