Squeeze the juice from the lemons into a small bowl and mix with the garlic.
Brush over each salmon fillet, let marinate in the fridge for at least 2 hours.
Sprinkle the top with a dash of rosemary.
When ready to prepare, spray a skillet with non-stick cooking spray and cook on both sides for about 4-5 minutes, medium heat, or until the fish is easily able to flake with a fork.