01 - Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease it.
02 - Place the salmon fillets on the prepared baking sheet. Drizzle generously with olive oil, then season with sea salt, freshly ground black pepper, and paprika (if using). Arrange lemon slices atop each fillet.
03 - Bake for 12 to 15 minutes, or until the salmon is opaque throughout and flakes easily with a fork.
04 - While the salmon bakes, prepare the fresh salsa. In a medium mixing bowl, combine the diced tomatoes, finely chopped red onion, seeded and chopped jalapeño (if using), chopped cilantro or parsley, lime juice, olive oil, salt, and black pepper. Toss gently until well combined.
05 - Carefully remove the baked salmon from the oven. Transfer each fillet to individual serving plates and spoon the fresh salsa generously over the top.
06 - Serve immediately, optionally garnished with additional lemon wedges.