Pre-heat oven to 375° and prepare a large sheet with a silicone baking mat or parchment paper.
Toss diced sweet potatoes with half the olive oil and oil. Spread across about 1/3 of the baking sheet and bake for 15 minutes.
While sweet potatoes are baking, wash and dry broccolini.
Remove sweet potatoes from oven after 15 minutes. Add salmon and broccolini to pan. Drizzle salmon and broccolini with remaining olive oil, salt, pepper and lemon juice. Leave lemon on pan as an aromatic. Bake for an additional 15 minutes or until potatoes are tender and salmon is cooked through.
Remove from oven and transfer to plates. Drizzle salmon with Basil Pesto and enjoy!