Preheat your oven to 200°C (390°F) and line a baking sheet with foil or parchment paper.
Place the salmon fillets skin-side down on the prepared baking sheet. Season lightly with salt and pepper, then bake for 12-15 minutes until the fish flakes easily with a fork and has a smoky aroma.
While the salmon bakes, halve the avocados, remove the pits, and scoop the flesh into a mixing bowl.
Add a squeeze of lemon juice, a drizzle of olive oil, and a pinch of chili flakes to the avocado. Gently mash with a fork until creamy but still slightly chunky, adjusting the seasoning as needed.
Once the salmon is cooked and slightly cooled, flake it into bite-sized pieces using forks or fingers, being careful to remove any skin or bones.
Finely chop the red onion and cilantro, then add them to the mashed avocado along with a splash of lime juice. Mix gently to combine.
Toss the mashed avocado mixture with the flaked salmon, ensuring the ingredients are evenly distributed and coated with the citrusy flavors.
Transfer the salad to serving plates, then sprinkle toasted sesame seeds on top for crunch and garnish with extra cilantro if desired.
Serve immediately to enjoy the contrast of warm, flaky fish with the cool, creamy avocado and fresh herbs.