Rinse the jasmine rice under cold water until clear. In a medium pot, bring water or broth to a boil. Add rice, butter, and salt. Reduce the heat, cover, and simmer for 15 minutes or until tender. Fluff with a fork and keep warm.
Season the salmon
In a small bowl, mix paprika, cayenne, garlic powder, onion powder, thyme, salt, and pepper. Pat the salmon dry, rub it with olive oil, then coat evenly with the spice mix.
Sear and cook
Heat a non-stick skillet over medium-high heat. Place the salmon skin-side down and cook for 3–4 minutes until crisp. Flip and cook another 2–3 minutes until flaky and golden.
Assemble and serve
Spoon the jasmine rice onto plates and top with the Cajun salmon. Squeeze a bit of fresh lemon juice over the fish before serving.