Preheat the oven to 375°F (190°C).
Combine the olive oil, garlic, lime juice, salt, cayenne pepper, and half of the cilantro in a small bowl. Stir until well mixed. Marinate the salmon in the mixture while the oven is preheating.
As soon as the oven is preheated, transfer the salmon to a baking sheet lined with aluminum foil or parchment paper. Bake until it is cooked through, about 15 minutes.
Remove from the oven, top with the remaining chopped cilantro, and garnish with lime. Serve immediately.