Preheat the oven to 400 degrees, make sure your oven rack is in the middle position.
Prep a baking sheet with cooking spray or oil.
In a small bowl combine the seasonings and spices - brown sugar, smoked paprika, kosher salt, garlic powder, onion powder, black pepper, oregano, cayenne pepper, and thyme.Give it a good stir so no brown sugar clumps remain.Tip: if you love spicy salmon add a little extra cayenne pepper!
Brush all sides of the salmon fillets with olive oil. Sprinkle the Cajun seasoning on all sides.
Place the fillets on the baking sheet and pop in the oven for 12-14 minutes, until the salmon is firm but not dry.Tip: if you have an instant read thermometer take the salmon out of the oven at 135° F.
Serve your salmon with a side of Cajun Aioli, a green veggie and a rice or pilaf.
Do not overcook your salmon. You want the salmon to be flaky and moist. I recommend cooking about 12 minutes, or at 135 degrees internal temperature.
Make sure your herbs and spices are full of flavor and not expired. Give them a good whiff, if you cannot smell them they should be replaced.
Purchase quality salmon, the flesh should be shiny, moist and brightly colored.