Preheat your oven to 400°F (200°C). Line a baking dish with parchment paper or lightly grease it with cooking spray.
Season the salmon fillets with olive oil, salt, black pepper, and lime juice. Place them in the prepared baking dish, skin-side down.
In a medium saucepan over medium heat, combine the coconut milk, red curry paste, brown sugar, soy sauce, ground ginger, and minced garlic. Stir well and bring to a simmer.
Add the diced red bell pepper and onion to the saucepan. Cook for about 5 minutes, until the vegetables are tender.
Pour the coconut curry sauce over the salmon fillets in the baking dish.
Bake in the preheated oven for 15-20 minutes, or until the salmon flakes easily with a fork.
Remove from the oven and garnish with chopped cilantro before serving.