Preheat the oven to 400°F. Place salmon fillets on a baking sheet lined with unbleached parchment paper. Season the salmon with olive oil, lemon juice, chopped dill or parsley, salt, and pepper.
Cut the sweet potatoes into wedges and place them on another baking sheet. Drizzle with olive oil and season with salt and pepper.
Bake both the salmon and sweet potatoes in the preheated oven for 15-20 minutes or until the salmon is cooked through and the sweet potatoes are tender.
While the salmon and sweet potatoes are baking, prepare the Greek yogurt sauce. In a small bowl, mix together Greek yogurt, lemon juice, chopped dill or parsley, salt, and pepper until well combined.
Once the salmon and sweet potatoes are done, serve them together on a plate. Drizzle the Greek yogurt sauce over the salmon and sprinkle slivered almonds on top for added crunch and a magnesium boost.