Cut the salmon into four separate 5oz pieces

Rub with rosemary and all-purpose seasoning let it sit for 15 minutes in room temperature.

Add the butter to a pan melt on medium heat.

Put the salmon in the pan and cover it for 5 minutes.

Uncover it and cook for 5 more minutes. Flip it cook for 5 more minutes.

Flip it one last time raise the heat to hight and cook for 2 minutes. Squeeze the lemon on top and its ready to be served.