Pick larger asparagus. Snap off the ends and toss (the asparagus will break where the tender/tough parts meet); keeping the tender top part. Slice on an angle into thin, small pieces. Heat up some olive oil and a little butter in a saute pan; add the asparagus and saute with some fresh ground black pepper and sea salt until done (about 5 minutes).
Put a bed of asparagus on the plate and place the cooked piece of fish over it. Top your fish with a pesto or salsa that will match the fish.