Preheat over to 400 degrees.
In a small bowl mix together the olive oil, garlic, salt, and pepper.
Brush salmon on both sides with the oil mixture. If the salmon's skin is still on then place on the sheet pan skin side down.
Place the asparagus next to the salmon. Toss asparagus with leftover oil mixture.
Sprinkle salmon and asparagus with shredded parmesan.
Slice the lemon into slices and place over the salmon and asparagus.
Bake for 20 minutes or until salmon is cooked and flakes easily. ** the salmon I made cooked perfectly in 20 minutes.