Preheat the oven to 400°F (200°C).
Brush salmon fillets with 2 tablespoons of olive oil and season with salt and pepper.
In a mixing bowl, combine panko breadcrumbs, Parmesan cheese, garlic powder, lemon zest, parsley, dill or thyme, salt, and pepper.
Press the herb mixture firmly onto the top of each salmon fillet.
Place the prepared salmon on a lined baking tray and bake for 12 to 14 minutes until flaky and the crust is golden.
Optional: broil the salmon for 1 to 2 minutes to deepen color.
In a bowl, combine mixed greens, cherry tomatoes, cucumber, red onion, and avocado slices if using.
Whisk together olive oil, lemon juice, Dijon mustard, honey, salt, and pepper to make the dressing.
Toss the salad lightly with the lemon dressing.
Plate the dressed salad and top each serving with a herb-crusted salmon fillet.
Serve immediately with extra lemon wedges if desired.