
Preheat oven to 450˚F with oven rack in top third. Line large rimmed baking sheet with parchment paper.
Place salmon filets in a row down the center of your lined baking pan. Arrange trimmed asparagus on the sides of the salmon.
Drizzle asparagus lightly with olive oil and roll to coat. Sprinkle both asparagus and salmon with salt and pepper.
In a medium bowl, mash together all ingredients for flavored butter. Spoon 3/4 of your flavored butter over the salmon and dab remaining butter on the asparagus.
Top each salmon filet with a slice of lemon and bake uncovered at 450˚F for 10-12 minutes, then broil for another 2-3 minutes.