It really depends on how you like your salmon. This recipe is designed to get the salmon to medium. You will know that it is there by gently flaking apart the top with a fork. If you meet a little bit of resistance but it flakes apart easily then you know it is done. Also, medium salmon should have a light pink color and not be dark pink or red. If it is, it needs another 2-3 minutes in the oven. Check and repeat for 2-3 minutes until it is done.