Preheat your oven to 400°F.
Line a baking sheet with parchment paper.
Lay lemon slices down and place the salmon, flesh side up, on top.
In a small bowl, mix the olive oil with all the seasonings, then pour the mixture evenly over the salmon.
Squeeze lemon juice over the top and add rosemary sprigs if using.
Bake uncovered for about 30 minutes, or until the salmon flakes easily and reaches an internal temp of 145°F.
