This was very easy and quite delicious. My fillets took about 25 minutes or so to cook, but they were reasonably thick.
1 lemon, thinly sliced
4 sprigs fresh rosemary
2 salmon fillets, bones and skin removed
coarse salt to taste
1 tablespoon olive oil
1) Preheat oven to 400°F
2) Arrange half the lemon slices in a single layer in a baking dish. Layer with 2 sprigs rosemary, and top with salmon fillets. Sprinkle salmon with salt, layer with remaining rosemary sprigs, and top with remaining lemon slices. Drizzle with olive oil.
3) Bake 20 minutes in the preheated oven, or until fish is easily flaked with a fork.