Blend butter with garlic (or buy garlic butter) and divide into three portions. You'll need the butter to top each salmon filet as soon as it is ready to serve, if desired.
Coat a skillet with olive oil.
Place salmon fillets skin side down inside the skillet.
Season evenly with Italian seasoning, salt, and pepper.
Squeeze the lemon over top of the salmon and cover loosely with foil.
Reduce barbecue heat to medium. Cook salmon for 10 -13 minutes and starting to become flaky. Then remove foil, turn barbecue up to high and close barbecue cover or lid for two more minutes.
Salmon will be cooked through and flake easily. Remove from grill, add butter to top, if desired, and get ready to serve. I don't usually add butter or add grill marks but my husband always does and boy oh boy does it taste great..