Place the salmon fillets on one side of a large baking sheet.
On the other side of the baking sheet, arrange the trimmed asparagus in a single layer.
Drizzle olive oil over both the salmon and asparagus.
Grate the zest of the lemon over the salmon and asparagus.
Sprinkle fresh herbs (rosemary, thyme, or your preferred herbs) over the salmon and asparagus.
Squeeze the juice of half the lemon over the entire sheet.
Season everything with salt and pepper to taste.
Carefully transfer the baking sheet to the preheated oven.
Bake for about 12-15 minutes, or until the salmon is cooked through and flakes easily with a fork, and the asparagus is tender yet crisp.
Remove from the oven and squeeze the juice of the remaining lemon half over the dish.
Serve the Lemon Herb Salmon and Asparagus with your choice of sides, such as quinoa, brown rice, or a fresh salad. Enjoy your simple and delicious one-pan meal!